20586779934 has 24 divisors (see below), whose sum is σ = 47895774408. Its totient is φ = 5881937040.

The previous prime is 20586779911. The next prime is 20586779951. The reversal of 20586779934 is 43997768502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35011237 + ... + 35011824.

It is an arithmetic number, because the mean of its divisors is an integer number (1995657267).

Almost surely, 2^20586779934 is an apocalyptic number.

20586779934 is an abundant number, since it is smaller than the sum of its proper divisors (27308994474).

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

20586779934 is a wasteful number, since it uses less digits than its factorization.

20586779934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70023080 (or 70023073 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 60.

The spelling of 20586779934 in words is "twenty billion, five hundred eighty-six million, seven hundred seventy-nine thousand, nine hundred thirty-four".