20257036 has 6 divisors (see below), whose sum is σ = 35449820. Its totient is φ = 10128516.

The previous prime is 20256967. The next prime is 20257067. The reversal of 20257036 is 63075202.

It is a self number, because there is not a number n which added to its sum of digits gives 20257036.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2532126 + ... + 2532133.

Almost surely, 2^20257036 is an apocalyptic number.

It is an amenable number.

20257036 is a deficient number, since it is larger than the sum of its proper divisors (15192784).

20257036 is a wasteful number, since it uses less digits than its factorization.

20257036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5064263 (or 5064261 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 20257036 is about 4500.7817098811. The cubic root of 20257036 is about 272.5996538137.

The spelling of 20257036 in words is "twenty million, two hundred fifty-seven thousand, thirty-six".