20156144012 has 12 divisors (see below), whose sum is σ = 35938785456. Its totient is φ = 9887919600.

The previous prime is 20156143979. The next prime is 20156144033. The reversal of 20156144012 is 21044165102.

It is a super-2 number, since 2×20156144012² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47537864 + ... + 47538287.

It is an arithmetic number, because the mean of its divisors is an integer number (2994898788).

Almost surely, 2^20156144012 is an apocalyptic number.

It is an amenable number.

20156144012 is a deficient number, since it is larger than the sum of its proper divisors (15782641444).

20156144012 is a wasteful number, since it uses less digits than its factorization.

20156144012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95076208 (or 95076206 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The spelling of 20156144012 in words is "twenty billion, one hundred fifty-six million, one hundred forty-four thousand, twelve".