20139736634 has 8 divisors (see below), whose sum is σ = 30486757620. Its totient is φ = 9977484096.

The previous prime is 20139736627. The next prime is 20139736651. The reversal of 20139736634 is 43663793102.

It can be written as a sum of positive squares in 2 ways, for example, as 20060473225 + 79263409 = 141635^2 + 8903^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 46191839 + ... + 46192274.

Almost surely, 2^20139736634 is an apocalyptic number.

20139736634 is a deficient number, since it is larger than the sum of its proper divisors (10347020986).

20139736634 is a wasteful number, since it uses less digits than its factorization.

20139736634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92384224.

The product of its (nonzero) digits is 489888, while the sum is 44.

The spelling of 20139736634 in words is "twenty billion, one hundred thirty-nine million, seven hundred thirty-six thousand, six hundred thirty-four".