21014444031 has 16 divisors (see below), whose sum is σ = 32024945664. Its totient is φ = 12007152864.

The previous prime is 21014443981. The next prime is 21014444047. The reversal of 21014444031 is 13044441012.

It is not a de Polignac number, because 21014444031 - 2⁹ = 21014443519 is a prime.

It is a super-2 number, since 2×21014444031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21014443992 and 21014444010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014444071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226170 + ... + 305256.

It is an arithmetic number, because the mean of its divisors is an integer number (2001559104).

Almost surely, 2^21014444031 is an apocalyptic number.

21014444031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21014444031 is a deficient number, since it is larger than the sum of its proper divisors (11010501633).

21014444031 is a wasteful number, since it uses less digits than its factorization.

21014444031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91750.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21014444031 its reverse (13044441012), we get a palindrome (34058885043).

The spelling of 21014444031 in words is "twenty-one billion, fourteen million, four hundred forty-four thousand, thirty-one".