20158800157 has 4 divisors (see below), whose sum is σ = 20287200316. Its totient is φ = 20030400000.

The previous prime is 20158800119. The next prime is 20158800191. The reversal of 20158800157 is 75100885102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12469965561 + 7688834596 = 111669^2 + 87686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20158800157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20158800257) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 64199844 + ... + 64200157.

It is an arithmetic number, because the mean of its divisors is an integer number (5071800079).

Almost surely, 2^20158800157 is an apocalyptic number.

It is an amenable number.

20158800157 is a deficient number, since it is larger than the sum of its proper divisors (128400159).

20158800157 is a wasteful number, since it uses less digits than its factorization.

20158800157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128400158.

The product of its (nonzero) digits is 22400, while the sum is 37.

The spelling of 20158800157 in words is "twenty billion, one hundred fifty-eight million, eight hundred thousand, one hundred fifty-seven".