20374940899 has 2 divisors, whose sum is σ = 20374940900. Its totient is φ = 20374940898.

The previous prime is 20374940863. The next prime is 20374940921. The reversal of 20374940899 is 99804947302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20374940899 - 2²¹ = 20372843747 is a prime.

It is not a weakly prime, because it can be changed into another prime (20374940699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10187470449 + 10187470450.

It is an arithmetic number, because the mean of its divisors is an integer number (10187470450).

Almost surely, 2^20374940899 is an apocalyptic number.

20374940899 is a deficient number, since it is larger than the sum of its proper divisors (1).

20374940899 is an equidigital number, since it uses as much as digits as its factorization.

20374940899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 20374940899 in words is "twenty billion, three hundred seventy-four million, nine hundred forty thousand, eight hundred ninety-nine".