23621953 has 4 divisors (see below), whose sum is σ = 23702868. Its totient is φ = 23541040.

The previous prime is 23621929. The next prime is 23621957. The reversal of 23621953 is 35912632.

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 10284849 + 13337104 = 3207^2 + 3652^2 .

It is a cyclic number.

It is not a de Polignac number, because 23621953 - 2¹³ = 23613761 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23621957) 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, 40018 + ... + 40603.

It is an arithmetic number, because the mean of its divisors is an integer number (5925717).

Almost surely, 2^23621953 is an apocalyptic number.

It is an amenable number.

23621953 is a deficient number, since it is larger than the sum of its proper divisors (80915).

23621953 is an equidigital number, since it uses as much as digits as its factorization.

23621953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80914.

The product of its digits is 9720, while the sum is 31.

The square root of 23621953 is about 4860.2420721606. The cubic root of 23621953 is about 286.9273410097.

The spelling of 23621953 in words is "twenty-three million, six hundred twenty-one thousand, nine hundred fifty-three".