20425764 has 24 divisors (see below), whose sum is σ = 47940480. Its totient is φ = 6768544.

The previous prime is 20425759. The next prime is 20425781. The reversal of 20425764 is 46752402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2844 + ... + 6995.

It is an arithmetic number, because the mean of its divisors is an integer number (1997520).

Almost surely, 2^20425764 is an apocalyptic number.

It is an amenable number.

20425764 is an abundant number, since it is smaller than the sum of its proper divisors (27514716).

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

20425764 is a wasteful number, since it uses less digits than its factorization.

20425764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10019 (or 10017 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 20425764 is about 4519.4871390458. The cubic root of 20425764 is about 273.3544216660.

Subtracting from 20425764 its product of nonzero digits (13440), we obtain a square (20412324 = 4518²).

The spelling of 20425764 in words is "twenty million, four hundred twenty-five thousand, seven hundred sixty-four".