23021424 has 30 divisors (see below), whose sum is σ = 64428416. Its totient is φ = 7673760.

The previous prime is 23021423. The next prime is 23021431. The reversal of 23021424 is 42412032.

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

It is a junction number, because it is equal to n+sod(n) for n = 23021397 and 23021406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23021423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79792 + ... + 80079.

Almost surely, 2^23021424 is an apocalyptic number.

23021424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

23021424 is an abundant number, since it is smaller than the sum of its proper divisors (41406992).

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

23021424 is a wasteful number, since it uses less digits than its factorization.

23021424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159885 (or 159876 counting only the distinct ones).

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

The square root of 23021424 is about 4798.0646098193. The cubic root of 23021424 is about 284.4749705918.

Adding to 23021424 its reverse (42412032), we get a palindrome (65433456).

The spelling of 23021424 in words is "twenty-three million, twenty-one thousand, four hundred twenty-four".