20155080 has 64 divisors (see below), whose sum is σ = 65966400. Its totient is φ = 4885760.

The previous prime is 20155073. The next prime is 20155097. The reversal of 20155080 is 8055102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6315 + ... + 8954.

It is an arithmetic number, because the mean of its divisors is an integer number (1030725).

Almost surely, 2^20155080 is an apocalyptic number.

20155080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20155080 is an abundant number, since it is smaller than the sum of its proper divisors (45811320).

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

20155080 is a wasteful number, since it uses less digits than its factorization.

20155080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15294 (or 15290 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 20155080 is about 4489.4409451512. The cubic root of 20155080 is about 272.1415425371.

The spelling of 20155080 in words is "twenty million, one hundred fifty-five thousand, eighty".