20615120694 has 24 divisors (see below), whose sum is σ = 51046965840. Its totient is φ = 5890034448.

The previous prime is 20615120689. The next prime is 20615120749. The reversal of 20615120694 is 49602151602.

20615120694 is a `hidden beast` number, since 20 + 61 + 512 + 0 + 69 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81805909 + ... + 81806160.

It is an arithmetic number, because the mean of its divisors is an integer number (2126956910).

Almost surely, 2^20615120694 is an apocalyptic number.

20615120694 is an abundant number, since it is smaller than the sum of its proper divisors (30431845146).

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

20615120694 is a wasteful number, since it uses less digits than its factorization.

20615120694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163612084 (or 163612081 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 20615120694 in words is "twenty billion, six hundred fifteen million, one hundred twenty thousand, six hundred ninety-four".