23021420 has 24 divisors (see below), whose sum is σ = 48598704. Its totient is φ = 9160256.

The previous prime is 23021393. The next prime is 23021423. The reversal of 23021420 is 2412032.

It is a junction number, because it is equal to n+sod(n) for n = 23021395 and 23021404.

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 7 ways as a sum of consecutive naturals, for example, 1019 + ... + 6861.

It is an arithmetic number, because the mean of its divisors is an integer number (2024946).

Almost surely, 2^23021420 is an apocalyptic number.

23021420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23021420 is an abundant number, since it is smaller than the sum of its proper divisors (25577284).

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

23021420 is a wasteful number, since it uses less digits than its factorization.

23021420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6049 (or 6047 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 23021420 is about 4798.0641929845. The cubic root of 23021420 is about 284.4749541158.

Adding to 23021420 its reverse (2412032), we get a palindrome (25433452).

The spelling of 23021420 in words is "twenty-three million, twenty-one thousand, four hundred twenty".