20913134690 has 32 divisors (see below), whose sum is σ = 43750488960. Its totient is φ = 7048687104.

The previous prime is 20913134659. The next prime is 20913134743. The reversal of 20913134690 is 9643131902.

It is a super-2 number, since 2×20913134690² (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 15 ways as a sum of consecutive naturals, for example, 2527727 + ... + 2535986.

It is an arithmetic number, because the mean of its divisors is an integer number (1367202780).

Almost surely, 2^20913134690 is an apocalyptic number.

20913134690 is an abundant number, since it is smaller than the sum of its proper divisors (22837354270).

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

20913134690 is a wasteful number, since it uses less digits than its factorization.

20913134690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5063786.

The product of its (nonzero) digits is 34992, while the sum is 38.

The spelling of 20913134690 in words is "twenty billion, nine hundred thirteen million, one hundred thirty-four thousand, six hundred ninety".