20156012 has 12 divisors (see below), whose sum is σ = 35799960. Its totient is φ = 9927456.

The previous prime is 20155987. The next prime is 20156021. The reversal of 20156012 is 21065102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37337 + ... + 37872.

It is an arithmetic number, because the mean of its divisors is an integer number (2983330).

Almost surely, 2^20156012 is an apocalyptic number.

It is an amenable number.

20156012 is a deficient number, since it is larger than the sum of its proper divisors (15643948).

20156012 is a wasteful number, since it uses less digits than its factorization.

20156012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75280 (or 75278 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 20156012 is about 4489.5447430669. The cubic root of 20156012 is about 272.1457372117.

The spelling of 20156012 in words is "twenty million, one hundred fifty-six thousand, twelve".