21586625045 has 16 divisors (see below), whose sum is σ = 27047364480. Its totient is φ = 16507977024.

The previous prime is 21586625023. The next prime is 21586625077. The reversal of 21586625045 is 54052668512.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21586625045 - 2⁶ = 21586624981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21586624987 and 21586625005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124886 + ... + 242424.

It is an arithmetic number, because the mean of its divisors is an integer number (1690460280).

Almost surely, 2^21586625045 is an apocalyptic number.

It is an amenable number.

21586625045 is a deficient number, since it is larger than the sum of its proper divisors (5460739435).

21586625045 is a wasteful number, since it uses less digits than its factorization.

21586625045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119164.

The product of its (nonzero) digits is 576000, while the sum is 44.

The spelling of 21586625045 in words is "twenty-one billion, five hundred eighty-six million, six hundred twenty-five thousand, forty-five".