23021430 has 16 divisors (see below), whose sum is σ = 55251504. Its totient is φ = 6139040.

The previous prime is 23021423. The next prime is 23021431. The reversal of 23021430 is 3412032.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23021431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383661 + ... + 383720.

It is an arithmetic number, because the mean of its divisors is an integer number (3453219).

Almost surely, 2^23021430 is an apocalyptic number.

23021430 is an abundant number, since it is smaller than the sum of its proper divisors (32230074).

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

23021430 is a wasteful number, since it uses less digits than its factorization.

23021430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767391.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 23021430 is about 4798.0652350713. The cubic root of 23021430 is about 284.4749953057.

Adding to 23021430 its reverse (3412032), we get a palindrome (26433462).

The spelling of 23021430 in words is "twenty-three million, twenty-one thousand, four hundred thirty".