21400144031 has 8 divisors (see below), whose sum is σ = 24495348864. Its totient is φ = 18314449560.

The previous prime is 21400143997. The next prime is 21400144057. The reversal of 21400144031 is 13044100412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21400144031 - 2²⁶ = 21333035167 is a prime.

It is a super-2 number, since 2×21400144031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21400143994 and 21400144012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21400144061) 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 7 ways as a sum of consecutive naturals, for example, 2372765 + ... + 2381766.

It is an arithmetic number, because the mean of its divisors is an integer number (3061918608).

Almost surely, 2^21400144031 is an apocalyptic number.

21400144031 is a deficient number, since it is larger than the sum of its proper divisors (3095204833).

21400144031 is an equidigital number, since it uses as much as digits as its factorization.

21400144031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4755181.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21400144031 its reverse (13044100412), we get a palindrome (34444244443).

The spelling of 21400144031 in words is "twenty-one billion, four hundred million, one hundred forty-four thousand, thirty-one".