20589520694 has 4 divisors (see below), whose sum is σ = 30884281044. Its totient is φ = 10294760346.

The previous prime is 20589520687. The next prime is 20589520703. The reversal of 20589520694 is 49602598502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49602598502 = 2 ⋅24801299251.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5147380172 + ... + 5147380175.

It is an arithmetic number, because the mean of its divisors is an integer number (7721070261).

Almost surely, 2^20589520694 is an apocalyptic number.

20589520694 is a deficient number, since it is larger than the sum of its proper divisors (10294760350).

20589520694 is a wasteful number, since it uses less digits than its factorization.

20589520694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10294760349.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The spelling of 20589520694 in words is "twenty billion, five hundred eighty-nine million, five hundred twenty thousand, six hundred ninety-four".