20230913 has 4 divisors (see below), whose sum is σ = 20342868. Its totient is φ = 20118960.

The previous prime is 20230883. The next prime is 20230919. The reversal of 20230913 is 31903202.

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 1507984 + 18722929 = 1228^2 + 4327^2 .

It is a cyclic number.

It is not a de Polignac number, because 20230913 - 2⁶ = 20230849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20230919) 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, 55706 + ... + 56067.

It is an arithmetic number, because the mean of its divisors is an integer number (5085717).

Almost surely, 2^20230913 is an apocalyptic number.

It is an amenable number.

20230913 is a deficient number, since it is larger than the sum of its proper divisors (111955).

20230913 is a wasteful number, since it uses less digits than its factorization.

20230913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111954.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 20230913 is about 4497.8787222423. The cubic root of 20230913 is about 272.4824240270.

It can be divided in two parts, 202 and 30913, that multiplied together give a palindrome (6244426).

The spelling of 20230913 in words is "twenty million, two hundred thirty thousand, nine hundred thirteen".