20523660157 has 48 divisors (see below), whose sum is σ = 28247054976. Its totient is φ = 14401036800.

The previous prime is 20523660149. The next prime is 20523660161. The reversal of 20523660157 is 75106632502.

It is not a de Polignac number, because 20523660157 - 2³ = 20523660149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523660137) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1676583 + ... + 1688779.

It is an arithmetic number, because the mean of its divisors is an integer number (588480312).

Almost surely, 2^20523660157 is an apocalyptic number.

It is an amenable number.

20523660157 is a deficient number, since it is larger than the sum of its proper divisors (7723394819).

20523660157 is a wasteful number, since it uses less digits than its factorization.

20523660157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12310 (or 12269 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 37.

The spelling of 20523660157 in words is "twenty billion, five hundred twenty-three million, six hundred sixty thousand, one hundred fifty-seven".