21032523510 has 16 divisors (see below), whose sum is σ = 50478056496. Its totient is φ = 5608672928.

The previous prime is 21032523509. The next prime is 21032523517. The reversal of 21032523510 is 1532523012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032523517) 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, 350542029 + ... + 350542088.

It is an arithmetic number, because the mean of its divisors is an integer number (3154878531).

Almost surely, 2^21032523510 is an apocalyptic number.

21032523510 is an abundant number, since it is smaller than the sum of its proper divisors (29445532986).

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

21032523510 is a wasteful number, since it uses less digits than its factorization.

21032523510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701084127.

The product of its (nonzero) digits is 1800, while the sum is 24.

The spelling of 21032523510 in words is "twenty-one billion, thirty-two million, five hundred twenty-three thousand, five hundred ten".