20496333985 has 32 divisors (see below), whose sum is σ = 26763180192. Its totient is φ = 15007825920.

The previous prime is 20496333967. The next prime is 20496333997. The reversal of 20496333985 is 58933369402.

It can be written as a sum of positive squares in 16 ways, for example, as 16824943521 + 3671390464 = 129711^2 + 60592^2 .

It is not a de Polignac number, because 20496333985 - 2¹³ = 20496325793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1095469 + ... + 1114021.

It is an arithmetic number, because the mean of its divisors is an integer number (836349381).

Almost surely, 2^20496333985 is an apocalyptic number.

It is an amenable number.

20496333985 is a deficient number, since it is larger than the sum of its proper divisors (6266846207).

20496333985 is a wasteful number, since it uses less digits than its factorization.

20496333985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18933.

The product of its (nonzero) digits is 4199040, while the sum is 52.

The spelling of 20496333985 in words is "twenty billion, four hundred ninety-six million, three hundred thirty-three thousand, nine hundred eighty-five".