20949229799 has 2 divisors, whose sum is σ = 20949229800. Its totient is φ = 20949229798.

The previous prime is 20949229789. The next prime is 20949229883. The reversal of 20949229799 is 99792294902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20949229799 - 2⁴ = 20949229783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20949229709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10474614899 + 10474614900.

It is an arithmetic number, because the mean of its divisors is an integer number (10474614900).

Almost surely, 2^20949229799 is an apocalyptic number.

20949229799 is a deficient number, since it is larger than the sum of its proper divisors (1).

20949229799 is an equidigital number, since it uses as much as digits as its factorization.

20949229799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13226976, while the sum is 62.

The spelling of 20949229799 in words is "twenty billion, nine hundred forty-nine million, two hundred twenty-nine thousand, seven hundred ninety-nine".