20156370 has 32 divisors (see below), whose sum is σ = 52097472. Its totient is φ = 4961472.

The previous prime is 20156369. The next prime is 20156401. The reversal of 20156370 is 7365102.

It is a self number, because there is not a number n which added to its sum of digits gives 20156370.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25452 + ... + 26231.

It is an arithmetic number, because the mean of its divisors is an integer number (1628046).

Almost surely, 2^20156370 is an apocalyptic number.

20156370 is an abundant number, since it is smaller than the sum of its proper divisors (31941102).

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

20156370 is a wasteful number, since it uses less digits than its factorization.

20156370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51706.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 20156370 is about 4489.5846133022. The cubic root of 20156370 is about 272.1473484364.

It can be divided in two parts, 2015 and 6370, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 20156370 in words is "twenty million, one hundred fifty-six thousand, three hundred seventy".