20993199312 has 20 divisors (see below), whose sum is σ = 54232431680. Its totient is φ = 6997733088.

The previous prime is 20993199299. The next prime is 20993199317. The reversal of 20993199312 is 21399139902.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 437358319 = 20993199312 / (2 + 0 + 9 + 9 + 3 + 1 + 9 + 9 + 3 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20993199317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218679112 + ... + 218679207.

It is an arithmetic number, because the mean of its divisors is an integer number (2711621584).

Almost surely, 2^20993199312 is an apocalyptic number.

It is an amenable number.

20993199312 is an abundant number, since it is smaller than the sum of its proper divisors (33239232368).

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

20993199312 is a wasteful number, since it uses less digits than its factorization.

20993199312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437358330 (or 437358324 counting only the distinct ones).

The product of its (nonzero) digits is 236196, while the sum is 48.

The spelling of 20993199312 in words is "twenty billion, nine hundred ninety-three million, one hundred ninety-nine thousand, three hundred twelve".