18748955 has 16 divisors (see below), whose sum is σ = 23556864. Its totient is φ = 14307840.

The previous prime is 18748949. The next prime is 18748957. The reversal of 18748955 is 55984781.

18748955 = 776² + 777² + ... + 805².

It is not a de Polignac number, because 18748955 - 2⁸ = 18748699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18748957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10487 + ... + 12143.

It is an arithmetic number, because the mean of its divisors is an integer number (1472304).

Almost surely, 2^18748955 is an apocalyptic number.

18748955 is a deficient number, since it is larger than the sum of its proper divisors (4807909).

18748955 is a wasteful number, since it uses less digits than its factorization.

18748955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766.

The product of its digits is 403200, while the sum is 47.

The square root of 18748955 is about 4330.0063510346. The cubic root of 18748955 is about 265.6597067453.

The spelling of 18748955 in words is "eighteen million, seven hundred forty-eight thousand, nine hundred fifty-five".