20023010431 has 4 divisors (see below), whose sum is σ = 21200834592. Its totient is φ = 18845186272.

The previous prime is 20023010429. The next prime is 20023010461. The reversal of 20023010431 is 13401032002.

It is a happy number.

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 20023010431 - 2¹ = 20023010429 is a prime.

It is a super-2 number, since 2×20023010431² (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 (20023010461) 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, 588912055 + ... + 588912088.

It is an arithmetic number, because the mean of its divisors is an integer number (5300208648).

Almost surely, 2^20023010431 is an apocalyptic number.

20023010431 is a deficient number, since it is larger than the sum of its proper divisors (1177824161).

20023010431 is a wasteful number, since it uses less digits than its factorization.

20023010431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177824160.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20023010431 its reverse (13401032002), we get a palindrome (33424042433).

The spelling of 20023010431 in words is "twenty billion, twenty-three million, ten thousand, four hundred thirty-one".