18980055 has 16 divisors (see below), whose sum is σ = 33742560. Its totient is φ = 10122624.

The previous prime is 18980053. The next prime is 18980077. The reversal of 18980055 is 55008981.

It is not a de Polignac number, because 18980055 - 2¹ = 18980053 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18980053) 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 15 ways as a sum of consecutive naturals, for example, 70162 + ... + 70431.

It is an arithmetic number, because the mean of its divisors is an integer number (2108910).

Almost surely, 2^18980055 is an apocalyptic number.

18980055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18980055 is a deficient number, since it is larger than the sum of its proper divisors (14762505).

18980055 is a wasteful number, since it uses less digits than its factorization.

18980055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140607 (or 140601 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 18980055 is about 4356.6104944096. The cubic root of 18980055 is about 266.7467615309.

The spelling of 18980055 in words is "eighteen million, nine hundred eighty thousand, fifty-five".