20625057550 has 12 divisors (see below), whose sum is σ = 38362607136. Its totient is φ = 8250023000.

The previous prime is 20625057533. The next prime is 20625057571. The reversal of 20625057550 is 5575052602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 206250526 + ... + 206250625.

It is an arithmetic number, because the mean of its divisors is an integer number (3196883928).

Almost surely, 2^20625057550 is an apocalyptic number.

20625057550 is a deficient number, since it is larger than the sum of its proper divisors (17737549586).

20625057550 is a wasteful number, since it uses less digits than its factorization.

20625057550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412501163 (or 412501158 counting only the distinct ones).

The product of its (nonzero) digits is 105000, while the sum is 37.

The spelling of 20625057550 in words is "twenty billion, six hundred twenty-five million, fifty-seven thousand, five hundred fifty".