20983993452 has 72 divisors (see below), whose sum is σ = 59119023600. Its totient is φ = 6236725248.

The previous prime is 20983993439. The next prime is 20983993463. The reversal of 20983993452 is 25439938902.

20983993452 is a `hidden beast` number, since 20 + 9 + 83 + 9 + 93 + 452 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 890677 + ... + 913932.

It is an arithmetic number, because the mean of its divisors is an integer number (821097550).

Almost surely, 2^20983993452 is an apocalyptic number.

It is an amenable number.

20983993452 is an abundant number, since it is smaller than the sum of its proper divisors (38135030148).

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

20983993452 is a wasteful number, since it uses less digits than its factorization.

20983993452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804655 (or 1804650 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 20983993452 in words is "twenty billion, nine hundred eighty-three million, nine hundred ninety-three thousand, four hundred fifty-two".