21414431445 has 32 divisors (see below), whose sum is σ = 37388386944. Its totient is φ = 10379846400.

The previous prime is 21414431443. The next prime is 21414431449. The reversal of 21414431445 is 54413441412.

It is not a de Polignac number, because 21414431445 - 2¹ = 21414431443 is a prime.

It is a super-2 number, since 2×21414431445² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21414431443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 645975 + ... + 678315.

It is an arithmetic number, because the mean of its divisors is an integer number (1168387092).

Almost surely, 2^21414431445 is an apocalyptic number.

It is an amenable number.

21414431445 is a deficient number, since it is larger than the sum of its proper divisors (15973955499).

21414431445 is a wasteful number, since it uses less digits than its factorization.

21414431445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36373.

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

Adding to 21414431445 its reverse (54413441412), we get a palindrome (75827872857).

The spelling of 21414431445 in words is "twenty-one billion, four hundred fourteen million, four hundred thirty-one thousand, four hundred forty-five".