20158657361 has 4 divisors (see below), whose sum is σ = 20459532912. Its totient is φ = 19857781812.

The previous prime is 20158657357. The next prime is 20158657417. The reversal of 20158657361 is 16375685102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20158657361 - 2² = 20158657357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20158657301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150437675 + ... + 150437808.

It is an arithmetic number, because the mean of its divisors is an integer number (5114883228).

Almost surely, 2^20158657361 is an apocalyptic number.

It is an amenable number.

20158657361 is a deficient number, since it is larger than the sum of its proper divisors (300875551).

20158657361 is an equidigital number, since it uses as much as digits as its factorization.

20158657361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300875550.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 20158657361 in words is "twenty billion, one hundred fifty-eight million, six hundred fifty-seven thousand, three hundred sixty-one".