20158434297 has 6 divisors (see below), whose sum is σ = 29117738442. Its totient is φ = 13438956192.

The previous prime is 20158434293. The next prime is 20158434311. The reversal of 20158434297 is 79243485102.

20158434297 is a `hidden beast` number, since 20 + 1 + 584 + 3 + 42 + 9 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13824821241 + 6333613056 = 117579^2 + 79584^2 .

It is not a de Polignac number, because 20158434297 - 2² = 20158434293 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20158434293) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1119913008 + ... + 1119913025.

It is an arithmetic number, because the mean of its divisors is an integer number (4852956407).

Almost surely, 2^20158434297 is an apocalyptic number.

It is an amenable number.

20158434297 is a deficient number, since it is larger than the sum of its proper divisors (8959304145).

20158434297 is a wasteful number, since it uses less digits than its factorization.

20158434297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239826039 (or 2239826036 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 20158434297 in words is "twenty billion, one hundred fifty-eight million, four hundred thirty-four thousand, two hundred ninety-seven".