23021442 has 32 divisors (see below), whose sum is σ = 51384960. Its totient is φ = 7639920.

The previous prime is 23021441. The next prime is 23021443. The reversal of 23021442 is 24412032.

It is an interprime number because it is at equal distance from previous prime (23021441) and next prime (23021443).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (23021441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13392 + ... + 15012.

It is an arithmetic number, because the mean of its divisors is an integer number (1605780).

Almost surely, 2^23021442 is an apocalyptic number.

23021442 is an abundant number, since it is smaller than the sum of its proper divisors (28363518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23021442 is a wasteful number, since it uses less digits than its factorization.

23021442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895 (or 1889 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 23021442 is about 4798.0664855752. The cubic root of 23021442 is about 284.4750447336.

Adding to 23021442 its reverse (24412032), we get a palindrome (47433474).

The spelling of 23021442 in words is "twenty-three million, twenty-one thousand, four hundred forty-two".