20125818 has 12 divisors (see below), whose sum is σ = 43605978. Its totient is φ = 6708600.

The previous prime is 20125799. The next prime is 20125829. The reversal of 20125818 is 81852102.

It can be written as a sum of positive squares in only one way, i.e., 19474569 + 651249 = 4413^2 + 807^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20125791 and 20125800.

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, 559033 + ... + 559068.

Almost surely, 2^20125818 is an apocalyptic number.

20125818 is an abundant number, since it is smaller than the sum of its proper divisors (23480160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20125818 is a wasteful number, since it uses less digits than its factorization.

20125818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118109 (or 1118106 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 20125818 is about 4486.1807810208. The cubic root of 20125818 is about 272.0097765373.

The spelling of 20125818 in words is "twenty million, one hundred twenty-five thousand, eight hundred eighteen".