23218902 has 48 divisors (see below), whose sum is σ = 57987072. Its totient is φ = 6577200.

The previous prime is 23218883. The next prime is 23218913. The reversal of 23218902 is 20981232.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15277 + ... + 16727.

It is an arithmetic number, because the mean of its divisors is an integer number (1208064).

Almost surely, 2^23218902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23218902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28993536).

23218902 is an abundant number, since it is smaller than the sum of its proper divisors (34768170).

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

23218902 is a wasteful number, since it uses less digits than its factorization.

23218902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593 (or 1590 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 23218902 is about 4818.5995890922. The cubic root of 23218902 is about 285.2860654929.

Subtracting from 23218902 its reverse (20981232), we obtain a triangular number (2237670 = T₂₁₁₅).

The spelling of 23218902 in words is "twenty-three million, two hundred eighteen thousand, nine hundred two".