20197291179 has 16 divisors (see below), whose sum is σ = 29031916032. Its totient is φ = 12415954848.

The previous prime is 20197291159. The next prime is 20197291181. The reversal of 20197291179 is 97119279102.

It is not a de Polignac number, because 20197291179 - 2⁹ = 20197290667 is a prime.

It is a super-2 number, since 2×20197291179² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20197291109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236499 + ... + 310364.

It is an arithmetic number, because the mean of its divisors is an integer number (1814494752).

Almost surely, 2^20197291179 is an apocalyptic number.

20197291179 is a deficient number, since it is larger than the sum of its proper divisors (8834624853).

20197291179 is a wasteful number, since it uses less digits than its factorization.

20197291179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547826.

The product of its (nonzero) digits is 142884, while the sum is 48.

The spelling of 20197291179 in words is "twenty billion, one hundred ninety-seven million, two hundred ninety-one thousand, one hundred seventy-nine".