20015374999 has 2 divisors, whose sum is σ = 20015375000. Its totient is φ = 20015374998.

The previous prime is 20015374963. The next prime is 20015375033. The reversal of 20015374999 is 99947351002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20015374999 - 2⁷ = 20015374871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20015374909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10007687499 + 10007687500.

It is an arithmetic number, because the mean of its divisors is an integer number (10007687500).

Almost surely, 2^20015374999 is an apocalyptic number.

20015374999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20015374999 is an equidigital number, since it uses as much as digits as its factorization.

20015374999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 49.

The spelling of 20015374999 in words is "twenty billion, fifteen million, three hundred seventy-four thousand, nine hundred ninety-nine".