20204530231 has 4 divisors (see below), whose sum is σ = 20901238200. Its totient is φ = 19507822264.

The previous prime is 20204530211. The next prime is 20204530301. The reversal of 20204530231 is 13203540202.

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 20204530231 - 2⁷ = 20204530103 is a prime.

It is a super-2 number, since 2×20204530231² (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 (20204530201) 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, 348353941 + ... + 348353998.

It is an arithmetic number, because the mean of its divisors is an integer number (5225309550).

Almost surely, 2^20204530231 is an apocalyptic number.

20204530231 is a deficient number, since it is larger than the sum of its proper divisors (696707969).

20204530231 is an equidigital number, since it uses as much as digits as its factorization.

20204530231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696707968.

The product of its (nonzero) digits is 1440, while the sum is 22.

The spelling of 20204530231 in words is "twenty billion, two hundred four million, five hundred thirty thousand, two hundred thirty-one".