21532500025003 has 32 divisors (see below), whose sum is σ = 24751130406912. Its totient is φ = 18540739879200.

The previous prime is 21532500024989. The next prime is 21532500025007. The reversal of 21532500025003 is 30052000523512.

It is a de Polignac number, because none of the positive numbers 2^k-21532500025003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21532500025007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 508937176 + ... + 508979482.

It is an arithmetic number, because the mean of its divisors is an integer number (773472825216).

Almost surely, 2^{21532500025003} is an apocalyptic number.

21532500025003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21532500025003 is a deficient number, since it is larger than the sum of its proper divisors (3218630381909).

21532500025003 is a wasteful number, since it uses less digits than its factorization.

21532500025003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61975.

The product of its (nonzero) digits is 9000, while the sum is 28.

Adding to 21532500025003 its reverse (30052000523512), we get a palindrome (51584500548515).

The spelling of 21532500025003 in words is "twenty-one trillion, five hundred thirty-two billion, five hundred million, twenty-five thousand, three".