20368793493 has 16 divisors (see below), whose sum is σ = 30253579200. Its totient is φ = 13544280720.

The previous prime is 20368793477. The next prime is 20368793507. The reversal of 20368793493 is 39439786302.

20368793493 is a `hidden beast` number, since 2 + 0 + 3 + 68 + 7 + 93 + 493 = 666.

It is not a de Polignac number, because 20368793493 - 2⁴ = 20368793477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20368793693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 959163 + ... + 980168.

It is an arithmetic number, because the mean of its divisors is an integer number (1890848700).

Almost surely, 2^20368793493 is an apocalyptic number.

It is an amenable number.

20368793493 is a deficient number, since it is larger than the sum of its proper divisors (9884785707).

20368793493 is a wasteful number, since it uses less digits than its factorization.

20368793493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939729 (or 1939723 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 54.

The spelling of 20368793493 in words is "twenty billion, three hundred sixty-eight million, seven hundred ninety-three thousand, four hundred ninety-three".