20673799231 has 4 divisors (see below), whose sum is σ = 20906089200. Its totient is φ = 20441509264.

The previous prime is 20673799177. The next prime is 20673799249. The reversal of 20673799231 is 13299737602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20673799231 - 2³¹ = 18526315583 is a prime.

It is a super-2 number, since 2×20673799231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20673791231) 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, 116144851 + ... + 116145028.

It is an arithmetic number, because the mean of its divisors is an integer number (5226522300).

Almost surely, 2^20673799231 is an apocalyptic number.

20673799231 is a deficient number, since it is larger than the sum of its proper divisors (232289969).

20673799231 is an equidigital number, since it uses as much as digits as its factorization.

20673799231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232289968.

The product of its (nonzero) digits is 857304, while the sum is 49.

The spelling of 20673799231 in words is "twenty billion, six hundred seventy-three million, seven hundred ninety-nine thousand, two hundred thirty-one".