20636425854 has 36 divisors (see below), whose sum is σ = 49146534528. Its totient is φ = 6253461720.

The previous prime is 20636425853. The next prime is 20636425951. The reversal of 20636425854 is 45852463602.

20636425854 is a `hidden beast` number, since 2 + 0 + 6 + 3 + 64 + 2 + 585 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20636425853) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4735294 + ... + 4739649.

Almost surely, 2^20636425854 is an apocalyptic number.

20636425854 is an abundant number, since it is smaller than the sum of its proper divisors (28510108674).

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

20636425854 is a wasteful number, since it uses less digits than its factorization.

20636425854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9474973 (or 9474959 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

The spelling of 20636425854 in words is "twenty billion, six hundred thirty-six million, four hundred twenty-five thousand, eight hundred fifty-four".