20023131001 has 4 divisors (see below), whose sum is σ = 20024596900. Its totient is φ = 20021665104.

The previous prime is 20023130957. The next prime is 20023131031. The reversal of 20023131001 is 10013132002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19614282601 + 408848400 = 140051^2 + 20220^2 .

It is a cyclic number.

It is not a de Polignac number, because 20023131001 - 2²⁵ = 19989576569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20023131031) 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, 712266 + ... + 739843.

It is an arithmetic number, because the mean of its divisors is an integer number (5006149225).

Almost surely, 2^20023131001 is an apocalyptic number.

It is an amenable number.

20023131001 is a deficient number, since it is larger than the sum of its proper divisors (1465899).

20023131001 is a wasteful number, since it uses less digits than its factorization.

20023131001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465898.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20023131001 its reverse (10013132002), we get a palindrome (30036263003).

The spelling of 20023131001 in words is "twenty billion, twenty-three million, one hundred thirty-one thousand, one".