20292399161 has 4 divisors (see below), whose sum is σ = 20292730512. Its totient is φ = 20292067812.

The previous prime is 20292399157. The next prime is 20292399167. The reversal of 20292399161 is 16199329202.

It is a happy number.

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 20292399161 - 2² = 20292399157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20292399167) 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, 44051 + ... + 206216.

It is an arithmetic number, because the mean of its divisors is an integer number (5073182628).

Almost surely, 2^20292399161 is an apocalyptic number.

It is an amenable number.

20292399161 is a deficient number, since it is larger than the sum of its proper divisors (331351).

20292399161 is an equidigital number, since it uses as much as digits as its factorization.

20292399161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331350.

The product of its (nonzero) digits is 104976, while the sum is 44.

The spelling of 20292399161 in words is "twenty billion, two hundred ninety-two million, three hundred ninety-nine thousand, one hundred sixty-one".