20311023 has 8 divisors (see below), whose sum is σ = 27127728. Its totient is φ = 13517504.

The previous prime is 20310973. The next prime is 20311043. The reversal of 20311023 is 32011302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20311023 - 2¹⁰ = 20309999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3636 + ... + 7337.

It is an arithmetic number, because the mean of its divisors is an integer number (3390966).

Almost surely, 2^20311023 is an apocalyptic number.

20311023 is a deficient number, since it is larger than the sum of its proper divisors (6816705).

20311023 is a wasteful number, since it uses less digits than its factorization.

20311023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11593.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 20311023 is about 4506.7752329132. The cubic root of 20311023 is about 272.8416073238.

Adding to 20311023 its reverse (32011302), we get a palindrome (52322325).

The spelling of 20311023 in words is "twenty million, three hundred eleven thousand, twenty-three".