20529653694 has 16 divisors (see below), whose sum is σ = 44791971840. Its totient is φ = 6221107160.

The previous prime is 20529653689. The next prime is 20529653731. The reversal of 20529653694 is 49635692502.

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, 155527614 + ... + 155527745.

It is an arithmetic number, because the mean of its divisors is an integer number (2799498240).

Almost surely, 2^20529653694 is an apocalyptic number.

20529653694 is an abundant number, since it is smaller than the sum of its proper divisors (24262318146).

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

20529653694 is a wasteful number, since it uses less digits than its factorization.

20529653694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311055375.

The product of its (nonzero) digits is 3499200, while the sum is 51.

The spelling of 20529653694 in words is "twenty billion, five hundred twenty-nine million, six hundred fifty-three thousand, six hundred ninety-four".