20206056499 has 2 divisors, whose sum is σ = 20206056500. Its totient is φ = 20206056498.

The previous prime is 20206056491. The next prime is 20206056551. The reversal of 20206056499 is 99465060202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20206056499 - 2³ = 20206056491 is a prime.

It is not a weakly prime, because it can be changed into another prime (20206056491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10103028249 + 10103028250.

It is an arithmetic number, because the mean of its divisors is an integer number (10103028250).

Almost surely, 2^20206056499 is an apocalyptic number.

20206056499 is a deficient number, since it is larger than the sum of its proper divisors (1).

20206056499 is an equidigital number, since it uses as much as digits as its factorization.

20206056499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 20206056499 in words is "twenty billion, two hundred six million, fifty-six thousand, four hundred ninety-nine".