23345820 has 60 divisors (see below), whose sum is σ = 73241784. Its totient is φ = 6225120.

The previous prime is 23345809. The next prime is 23345867. The reversal of 23345820 is 2854332.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×23345820² = 1090054622944800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5586 + ... + 8825.

Almost surely, 2^23345820 is an apocalyptic number.

23345820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23345820 is an abundant number, since it is smaller than the sum of its proper divisors (49895964).

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

23345820 is a wasteful number, since it uses less digits than its factorization.

23345820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14432 (or 14421 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 23345820 is about 4831.7512353183. The cubic root of 23345820 is about 285.8049267179.

The spelling of 23345820 in words is "twenty-three million, three hundred forty-five thousand, eight hundred twenty".