20969407379 has 2 divisors, whose sum is σ = 20969407380. Its totient is φ = 20969407378.

The previous prime is 20969407351. The next prime is 20969407387. The reversal of 20969407379 is 97370496902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20969407379 - 2²⁸ = 20700971923 is a prime.

It is not a weakly prime, because it can be changed into another prime (20969427379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10484703689 + 10484703690.

It is an arithmetic number, because the mean of its divisors is an integer number (10484703690).

Almost surely, 2^20969407379 is an apocalyptic number.

20969407379 is a deficient number, since it is larger than the sum of its proper divisors (1).

20969407379 is an equidigital number, since it uses as much as digits as its factorization.

20969407379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5143824, while the sum is 56.

The spelling of 20969407379 in words is "twenty billion, nine hundred sixty-nine million, four hundred seven thousand, three hundred seventy-nine".