20497058597 has 4 divisors (see below), whose sum is σ = 20497471116. Its totient is φ = 20496646080.

The previous prime is 20497058573. The next prime is 20497058599. The reversal of 20497058597 is 79585079402.

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 15243853156 + 5253205441 = 123466^2 + 72479^2 .

It is a cyclic number.

It is not a de Polignac number, because 20497058597 - 2¹⁶ = 20496993061 is a prime.

It is a super-2 number, since 2×20497058597² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20497058599) 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, 119588 + ... + 235149.

It is an arithmetic number, because the mean of its divisors is an integer number (5124367779).

Almost surely, 2^20497058597 is an apocalyptic number.

It is an amenable number.

20497058597 is a deficient number, since it is larger than the sum of its proper divisors (412519).

20497058597 is an equidigital number, since it uses as much as digits as its factorization.

20497058597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412518.

The product of its (nonzero) digits is 6350400, while the sum is 56.

The spelling of 20497058597 in words is "twenty billion, four hundred ninety-seven million, fifty-eight thousand, five hundred ninety-seven".