23555620 has 24 divisors (see below), whose sum is σ = 53964288. Its totient is φ = 8565600.

The previous prime is 23555603. The next prime is 23555621. The reversal of 23555620 is 2655532.

23555620 = T₂₀₆₄ + T₂₀₆₅ + ... + T₂₀₇₄.

It is not an unprimeable number, because it can be changed into a prime (23555621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53316 + ... + 53755.

It is an arithmetic number, because the mean of its divisors is an integer number (2248512).

Almost surely, 2^23555620 is an apocalyptic number.

23555620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23555620 is an abundant number, since it is smaller than the sum of its proper divisors (30408668).

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

23555620 is a wasteful number, since it uses less digits than its factorization.

23555620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107091 (or 107089 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 23555620 is about 4853.4132319431. The cubic root of 23555620 is about 286.6585148815.

It can be divided in two parts, 235 and 55620, that added together give a palindrome (55855).

The spelling of 23555620 in words is "twenty-three million, five hundred fifty-five thousand, six hundred twenty".