20330019979 has 2 divisors, whose sum is σ = 20330019980. Its totient is φ = 20330019978.

The previous prime is 20330019973. The next prime is 20330020003. The reversal of 20330019979 is 97991003302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20330019979 - 2³ = 20330019971 is a prime.

It is not a weakly prime, because it can be changed into another prime (20330019971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165009989 + 10165009990.

It is an arithmetic number, because the mean of its divisors is an integer number (10165009990).

Almost surely, 2^20330019979 is an apocalyptic number.

20330019979 is a deficient number, since it is larger than the sum of its proper divisors (1).

20330019979 is an equidigital number, since it uses as much as digits as its factorization.

20330019979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91854, while the sum is 43.

The spelling of 20330019979 in words is "twenty billion, three hundred thirty million, nineteen thousand, nine hundred seventy-nine".