23542220 has 24 divisors (see below), whose sum is σ = 53242224. Its totient is φ = 8692416.

The previous prime is 23542219. The next prime is 23542243. The reversal of 23542220 is 2224532.

It is a super-2 number, since 2×23542220² = 1108472245056800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 23542192 and 23542201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45014 + ... + 45533.

It is an arithmetic number, because the mean of its divisors is an integer number (2218426).

Almost surely, 2^23542220 is an apocalyptic number.

23542220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23542220 is an abundant number, since it is smaller than the sum of its proper divisors (29700004).

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

23542220 is a wasteful number, since it uses less digits than its factorization.

23542220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90569 (or 90567 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 23542220 is about 4852.0325637819. The cubic root of 23542220 is about 286.6041477749.

Adding to 23542220 its reverse (2224532), we get a palindrome (25766752).

The spelling of 23542220 in words is "twenty-three million, five hundred forty-two thousand, two hundred twenty".