20351836734 has 16 divisors (see below), whose sum is σ = 41106681360. Its totient is φ = 6716777600.

The previous prime is 20351836723. The next prime is 20351836751. The reversal of 20351836734 is 43763815302.

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, 16791339 + ... + 16792550.

It is an arithmetic number, because the mean of its divisors is an integer number (2569167585).

Almost surely, 2^20351836734 is an apocalyptic number.

20351836734 is an abundant number, since it is smaller than the sum of its proper divisors (20754844626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20351836734 is a wasteful number, since it uses less digits than its factorization.

20351836734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33583995.

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 20351836734 in words is "twenty billion, three hundred fifty-one million, eight hundred thirty-six thousand, seven hundred thirty-four".