20901179659 has 2 divisors, whose sum is σ = 20901179660. Its totient is φ = 20901179658.

The previous prime is 20901179647. The next prime is 20901179699. The reversal of 20901179659 is 95697110902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20901179659 - 2⁹ = 20901179147 is a prime.

It is a super-2 number, since 2×20901179659² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20901179699) 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 as a sum of consecutive naturals, namely, 10450589829 + 10450589830.

It is an arithmetic number, because the mean of its divisors is an integer number (10450589830).

Almost surely, 2^20901179659 is an apocalyptic number.

20901179659 is a deficient number, since it is larger than the sum of its proper divisors (1).

20901179659 is an equidigital number, since it uses as much as digits as its factorization.

20901179659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 49.

The spelling of 20901179659 in words is "twenty billion, nine hundred one million, one hundred seventy-nine thousand, six hundred fifty-nine".