20625577475 has 24 divisors (see below), whose sum is σ = 25857511680. Its totient is φ = 16319077920.

The previous prime is 20625577463. The next prime is 20625577477. The reversal of 20625577475 is 57477552602.

It is not a de Polignac number, because 20625577475 - 2²⁴ = 20608800259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20625577477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2155652 + ... + 2165198.

It is an arithmetic number, because the mean of its divisors is an integer number (1077396320).

Almost surely, 2^20625577475 is an apocalyptic number.

20625577475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20625577475 is a deficient number, since it is larger than the sum of its proper divisors (5231934205).

20625577475 is a wasteful number, since it uses less digits than its factorization.

20625577475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10499 (or 10494 counting only the distinct ones).

The product of its (nonzero) digits is 4116000, while the sum is 50.

The spelling of 20625577475 in words is "twenty billion, six hundred twenty-five million, five hundred seventy-seven thousand, four hundred seventy-five".