20056858 has 4 divisors (see below), whose sum is σ = 30085290. Its totient is φ = 10028428.

The previous prime is 20056853. The next prime is 20056879. The reversal of 20056858 is 85865002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19421649 + 635209 = 4407^2 + 797^2 .

It is not an unprimeable number, because it can be changed into a prime (20056853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5014213 + ... + 5014216.

Almost surely, 2^20056858 is an apocalyptic number.

20056858 is a deficient number, since it is larger than the sum of its proper divisors (10028432).

20056858 is a wasteful number, since it uses less digits than its factorization.

20056858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10028431.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 20056858 is about 4478.4883610433. The cubic root of 20056858 is about 271.6987455480.

The spelling of 20056858 in words is "twenty million, fifty-six thousand, eight hundred fifty-eight".