20151501899 has 2 divisors, whose sum is σ = 20151501900. Its totient is φ = 20151501898.

The previous prime is 20151501869. The next prime is 20151501947. The reversal of 20151501899 is 99810515102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20151501899 - 2²⁴ = 20134724683 is a prime.

It is not a weakly prime, because it can be changed into another prime (20151501869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10075750949 + 10075750950.

It is an arithmetic number, because the mean of its divisors is an integer number (10075750950).

Almost surely, 2^20151501899 is an apocalyptic number.

20151501899 is a deficient number, since it is larger than the sum of its proper divisors (1).

20151501899 is an equidigital number, since it uses as much as digits as its factorization.

20151501899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 41.

The spelling of 20151501899 in words is "twenty billion, one hundred fifty-one million, five hundred one thousand, eight hundred ninety-nine".