20097158399 has 4 divisors (see below), whose sum is σ = 20380217040. Its totient is φ = 19814099760.

The previous prime is 20097158387. The next prime is 20097158407. The reversal of 20097158399 is 99385179002.

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

It is a cyclic number.

It is not a de Polignac number, because 20097158399 - 2⁴ = 20097158383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20097158399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20097152399) 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, 141529214 + ... + 141529355.

It is an arithmetic number, because the mean of its divisors is an integer number (5095054260).

Almost surely, 2^20097158399 is an apocalyptic number.

20097158399 is a deficient number, since it is larger than the sum of its proper divisors (283058641).

20097158399 is an equidigital number, since it uses as much as digits as its factorization.

20097158399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283058640.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The spelling of 20097158399 in words is "twenty billion, ninety-seven million, one hundred fifty-eight thousand, three hundred ninety-nine".