20057704 has 8 divisors (see below), whose sum is σ = 37608210. Its totient is φ = 10028848.

The previous prime is 20057683. The next prime is 20057717. The reversal of 20057704 is 40775002.

It can be written as a sum of positive squares in only one way, i.e., 10876804 + 9180900 = 3298^2 + 3030^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20057704² = 804622979503232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1253599 + ... + 1253614.

Almost surely, 2^20057704 is an apocalyptic number.

It is an amenable number.

20057704 is a deficient number, since it is larger than the sum of its proper divisors (17550506).

20057704 is a wasteful number, since it uses less digits than its factorization.

20057704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507219 (or 2507215 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 20057704 is about 4478.5828115599. The cubic root of 20057704 is about 271.7025655865.

The spelling of 20057704 in words is "twenty million, fifty-seven thousand, seven hundred four".