20392871499 has 96 divisors (see below), whose sum is σ = 41288647680. Its totient is φ = 9778708800.

The previous prime is 20392871497. The next prime is 20392871507. The reversal of 20392871499 is 99417829302.

It is not a de Polignac number, because 20392871499 - 2¹ = 20392871497 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20392871491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 135294 + ... + 243084.

It is an arithmetic number, because the mean of its divisors is an integer number (430090080).

Almost surely, 2^20392871499 is an apocalyptic number.

20392871499 is an abundant number, since it is smaller than the sum of its proper divisors (20895776181).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20392871499 is a wasteful number, since it uses less digits than its factorization.

20392871499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107838 (or 107825 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 20392871499 in words is "twenty billion, three hundred ninety-two million, eight hundred seventy-one thousand, four hundred ninety-nine".