21045859025 has 12 divisors (see below), whose sum is σ = 26539186800. Its totient is φ = 16551318480.

The previous prime is 21045859013. The next prime is 21045859097. The reversal of 21045859025 is 52095854012.

It is not a de Polignac number, because 21045859025 - 2²⁴ = 21029081809 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7132715 + ... + 7135664.

It is an arithmetic number, because the mean of its divisors is an integer number (2211598900).

Almost surely, 2^21045859025 is an apocalyptic number.

21045859025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21045859025 is a deficient number, since it is larger than the sum of its proper divisors (5493327775).

21045859025 is a wasteful number, since it uses less digits than its factorization.

21045859025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14268448 (or 14268443 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 41.

The spelling of 21045859025 in words is "twenty-one billion, forty-five million, eight hundred fifty-nine thousand, twenty-five".