20000057 has 16 divisors (see below), whose sum is σ = 25073664. Its totient is φ = 15498000.

The previous prime is 20000047. The next prime is 20000059. The reversal of 20000057 is 75000002.

It is not a de Polignac number, because 20000057 - 2¹⁴ = 19983673 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19999996 and 20000050.

It is not an unprimeable number, because it can be changed into a prime (20000059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15632 + ... + 16862.

It is an arithmetic number, because the mean of its divisors is an integer number (1567104).

Almost surely, 2^20000057 is an apocalyptic number.

It is an amenable number.

20000057 is a deficient number, since it is larger than the sum of its proper divisors (5073607).

20000057 is a wasteful number, since it uses less digits than its factorization.

20000057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460.

The product of its (nonzero) digits is 70, while the sum is 14.

The square root of 20000057 is about 4472.1423277888. The cubic root of 20000057 is about 271.4420195289.

Adding to 20000057 its reverse (75000002), we get a palindrome (95000059).

Subtracting 20000057 from its reverse (75000002), we obtain a palindrome (54999945).

The spelling of 20000057 in words is "twenty million, fifty-seven", and thus it is an aban number and an uban number.