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21414444531 = 37138148177
BaseRepresentation
bin10011111100011001…
…100111110111110011
32001021102001111101020
4103330121213313303
5322324044211111
613500533510523
71355445526614
oct237431476763
961242044336
1021414444531
119099994147
1241977a2443
132033742c6c
1410720b7c0b
15855015906
hex4fc667df3

21414444531 has 4 divisors (see below), whose sum is σ = 28552592712. Its totient is φ = 14276296352.

The previous prime is 21414444529. The next prime is 21414444539. The reversal of 21414444531 is 13544441412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21414444531 - 21 = 21414444529 is a prime.

It is a super-2 number, since 2×214144445312 (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21414444492 and 21414444501.

It is not an unprimeable number, because it can be changed into a prime (21414444539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3569074086 + ... + 3569074091.

It is an arithmetic number, because the mean of its divisors is an integer number (7138148178).

Almost surely, 221414444531 is an apocalyptic number.

21414444531 is a deficient number, since it is larger than the sum of its proper divisors (7138148181).

21414444531 is an equidigital number, since it uses as much as digits as its factorization.

21414444531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7138148180.

The product of its digits is 30720, while the sum is 33.

Adding to 21414444531 its reverse (13544441412), we get a palindrome (34958885943).

The spelling of 21414444531 in words is "twenty-one billion, four hundred fourteen million, four hundred forty-four thousand, five hundred thirty-one".

Divisors: 1 3 7138148177 21414444531