23021953 has 2 divisors, whose sum is σ = 23021954. Its totient is φ = 23021952.

The previous prime is 23021941. The next prime is 23021983. The reversal of 23021953 is 35912032.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20142144 + 2879809 = 4488^2 + 1697^2 .

It is a cyclic number.

It is not a de Polignac number, because 23021953 - 2⁹ = 23021441 is a prime.

It is not a weakly prime, because it can be changed into another prime (23021903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11510976 + 11510977.

It is an arithmetic number, because the mean of its divisors is an integer number (11510977).

Almost surely, 2^23021953 is an apocalyptic number.

It is an amenable number.

23021953 is a deficient number, since it is larger than the sum of its proper divisors (1).

23021953 is an equidigital number, since it uses as much as digits as its factorization.

23021953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 23021953 is about 4798.1197358966. The cubic root of 23021953 is about 284.4771495202.

Adding to 23021953 its reverse (35912032), we get a palindrome (58933985).

The spelling of 23021953 in words is "twenty-three million, twenty-one thousand, nine hundred fifty-three".