23021901 has 40 divisors (see below), whose sum is σ = 41391680. Its totient is φ = 12457152.

The previous prime is 23021861. The next prime is 23021903. The reversal of 23021901 is 10912032.

It is a happy number.

It is not a de Polignac number, because 23021901 - 2⁶ = 23021837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23021903) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9705 + ... + 11841.

It is an arithmetic number, because the mean of its divisors is an integer number (1034792).

Almost surely, 2^23021901 is an apocalyptic number.

23021901 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23021901 is a deficient number, since it is larger than the sum of its proper divisors (18369779).

23021901 is a wasteful number, since it uses less digits than its factorization.

23021901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175 (or 2166 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 23021901 is about 4798.1143171042. The cubic root of 23021901 is about 284.4769353359.

Adding to 23021901 its reverse (10912032), we get a palindrome (33933933).

The spelling of 23021901 in words is "twenty-three million, twenty-one thousand, nine hundred one".