20055500 has 24 divisors (see below), whose sum is σ = 43802304. Its totient is φ = 8022000.

The previous prime is 20055491. The next prime is 20055547. The reversal of 20055500 is 555002.

20055500 = T₂₆₉ + T₂₇₀ + ... + T₅₁₈.

It is a happy number.

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, 19556 + ... + 20555.

It is an arithmetic number, because the mean of its divisors is an integer number (1825096).

Almost surely, 2^20055500 is an apocalyptic number.

20055500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20055500 is an abundant number, since it is smaller than the sum of its proper divisors (23746804).

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

20055500 is a wasteful number, since it uses less digits than its factorization.

20055500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40130 (or 40118 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 17.

The square root of 20055500 is about 4478.3367448194. The cubic root of 20055500 is about 271.6926133941.

The spelling of 20055500 in words is "twenty million, fifty-five thousand, five hundred".