20332020431 has 4 divisors (see below), whose sum is σ = 20715643512. Its totient is φ = 19948397352.

The previous prime is 20332020427. The next prime is 20332020461. The reversal of 20332020431 is 13402023302.

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 20332020431 - 2² = 20332020427 is a prime.

It is a super-2 number, since 2×20332020431² (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 (20332020461) 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, 191811461 + ... + 191811566.

It is an arithmetic number, because the mean of its divisors is an integer number (5178910878).

Almost surely, 2^20332020431 is an apocalyptic number.

20332020431 is a deficient number, since it is larger than the sum of its proper divisors (383623081).

20332020431 is an equidigital number, since it uses as much as digits as its factorization.

20332020431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383623080.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 20332020431 its reverse (13402023302), we get a palindrome (33734043733).

The spelling of 20332020431 in words is "twenty billion, three hundred thirty-two million, twenty thousand, four hundred thirty-one".