20303431023 has 16 divisors (see below), whose sum is σ = 27863804000. Its totient is φ = 13140942336.

The previous prime is 20303431009. The next prime is 20303431051. The reversal of 20303431023 is 32013430302.

It is not a de Polignac number, because 20303431023 - 2¹⁴ = 20303414639 is a prime.

It is a super-2 number, since 2×20303431023² (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 (20303431003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149398 + ... + 250851.

It is an arithmetic number, because the mean of its divisors is an integer number (1741487750).

Almost surely, 2^20303431023 is an apocalyptic number.

20303431023 is a deficient number, since it is larger than the sum of its proper divisors (7560372977).

20303431023 is a wasteful number, since it uses less digits than its factorization.

20303431023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400746.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 20303431023 its reverse (32013430302), we get a palindrome (52316861325).

The spelling of 20303431023 in words is "twenty billion, three hundred three million, four hundred thirty-one thousand, twenty-three".