23361820 has 48 divisors (see below), whose sum is σ = 51891840. Its totient is φ = 8820224.

The previous prime is 23361809. The next prime is 23361853. The reversal of 23361820 is 2816332.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26832 + ... + 27688.

It is an arithmetic number, because the mean of its divisors is an integer number (1081080).

Almost surely, 2^23361820 is an apocalyptic number.

23361820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23361820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25945920).

23361820 is an abundant number, since it is smaller than the sum of its proper divisors (28530020).

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

23361820 is a wasteful number, since it uses less digits than its factorization.

23361820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942 (or 940 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 23361820 is about 4833.4066661104. The cubic root of 23361820 is about 285.8702037076.

The spelling of 23361820 in words is "twenty-three million, three hundred sixty-one thousand, eight hundred twenty".