20993792894 has 8 divisors (see below), whose sum is σ = 31533652920. Its totient is φ = 10482575256.

The previous prime is 20993792851. The next prime is 20993792909. The reversal of 20993792894 is 49829739902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×20993792894³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7158764 + ... + 7161695.

It is an arithmetic number, because the mean of its divisors is an integer number (3941706615).

Almost surely, 2^20993792894 is an apocalyptic number.

20993792894 is a deficient number, since it is larger than the sum of its proper divisors (10539860026).

20993792894 is a wasteful number, since it uses less digits than its factorization.

20993792894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14321194.

The product of its (nonzero) digits is 17635968, while the sum is 62.

The spelling of 20993792894 in words is "twenty billion, nine hundred ninety-three million, seven hundred ninety-two thousand, eight hundred ninety-four".