10521491924 has 12 divisors (see below), whose sum is σ = 18575555124. Its totient is φ = 5214190464.

The previous prime is 10521491881. The next prime is 10521491951. The reversal of 10521491924 is 42919412501.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5260600900 + 5260891024 = 72530^2 + 72532^2 .

It is a super-2 number, since 2×10521491924² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11638367 + ... + 11639270.

It is an arithmetic number, because the mean of its divisors is an integer number (1547962927).

Almost surely, 2^10521491924 is an apocalyptic number.

It is an amenable number.

10521491924 is a deficient number, since it is larger than the sum of its proper divisors (8054063200).

10521491924 is a wasteful number, since it uses less digits than its factorization.

10521491924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23277754 (or 23277752 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The spelling of 10521491924 in words is "ten billion, five hundred twenty-one million, four hundred ninety-one thousand, nine hundred twenty-four".