20372979929 has 2 divisors, whose sum is σ = 20372979930. Its totient is φ = 20372979928.

The previous prime is 20372979889. The next prime is 20372980007. The reversal of 20372979929 is 92997927302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19167848704 + 1205131225 = 138448^2 + 34715^2 .

It is a cyclic number.

It is not a de Polignac number, because 20372979929 - 2²⁰ = 20371931353 is a prime.

It is a super-2 number, since 2×20372979929² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20372979329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10186489964 + 10186489965.

It is an arithmetic number, because the mean of its divisors is an integer number (10186489965).

Almost surely, 2^20372979929 is an apocalyptic number.

It is an amenable number.

20372979929 is a deficient number, since it is larger than the sum of its proper divisors (1).

20372979929 is an equidigital number, since it uses as much as digits as its factorization.

20372979929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7715736, while the sum is 59.

The spelling of 20372979929 in words is "twenty billion, three hundred seventy-two million, nine hundred seventy-nine thousand, nine hundred twenty-nine".