20402270099 has 2 divisors, whose sum is σ = 20402270100. Its totient is φ = 20402270098.

The previous prime is 20402270093. The next prime is 20402270123. The reversal of 20402270099 is 99007220402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20402270099 is a prime.

It is not a weakly prime, because it can be changed into another prime (20402270093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201135049 + 10201135050.

It is an arithmetic number, because the mean of its divisors is an integer number (10201135050).

Almost surely, 2^20402270099 is an apocalyptic number.

20402270099 is a deficient number, since it is larger than the sum of its proper divisors (1).

20402270099 is an equidigital number, since it uses as much as digits as its factorization.

20402270099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 20402270099 in words is "twenty billion, four hundred two million, two hundred seventy thousand, ninety-nine".