20631518734 has 16 divisors (see below), whose sum is σ = 31706122896. Its totient is φ = 10062875200.

The previous prime is 20631518707. The next prime is 20631518777. The reversal of 20631518734 is 43781513602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1128849 + ... + 1146979.

It is an arithmetic number, because the mean of its divisors is an integer number (1981632681).

Almost surely, 2^20631518734 is an apocalyptic number.

20631518734 is a deficient number, since it is larger than the sum of its proper divisors (11074604162).

20631518734 is a wasteful number, since it uses less digits than its factorization.

20631518734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32051.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 20631518734 in words is "twenty billion, six hundred thirty-one million, five hundred eighteen thousand, seven hundred thirty-four".