20144402156 has 12 divisors (see below), whose sum is σ = 36785430192. Its totient is φ = 9634279248.

The previous prime is 20144402141. The next prime is 20144402183. The reversal of 20144402156 is 65120444102.

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, 109480355 + ... + 109480538.

It is an arithmetic number, because the mean of its divisors is an integer number (3065452516).

Almost surely, 2^20144402156 is an apocalyptic number.

It is an amenable number.

20144402156 is a deficient number, since it is larger than the sum of its proper divisors (16641028036).

20144402156 is a wasteful number, since it uses less digits than its factorization.

20144402156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218960920 (or 218960918 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 20144402156 its reverse (65120444102), we get a palindrome (85264846258).

The spelling of 20144402156 in words is "twenty billion, one hundred forty-four million, four hundred two thousand, one hundred fifty-six".