10521004640 has 48 divisors (see below), whose sum is σ = 25226882352. Its totient is φ = 4145585664.

The previous prime is 10521004633. The next prime is 10521004643. The reversal of 10521004640 is 4640012501.

It is a super-2 number, since 2×10521004640² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10521004643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479999 + ... + 501438.

It is an arithmetic number, because the mean of its divisors is an integer number (525560049).

Almost surely, 2^10521004640 is an apocalyptic number.

10521004640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10521004640 is an abundant number, since it is smaller than the sum of its proper divisors (14705877712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10521004640 is an equidigital number, since it uses as much as digits as its factorization.

10521004640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981519 (or 981511 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The spelling of 10521004640 in words is "ten billion, five hundred twenty-one million, four thousand, six hundred forty".