18955253 has 6 divisors (see below), whose sum is σ = 19223874. Its totient is φ = 18690336.

The previous prime is 18955247. The next prime is 18955271. The reversal of 18955253 is 35255981.

It can be written as a sum of positive squares in 3 ways, for example, as 1129969 + 17825284 = 1063^2 + 4222^2 .

It is not a de Polignac number, because 18955253 - 2¹⁸ = 18693109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18955213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3551 + ... + 7107.

It is an arithmetic number, because the mean of its divisors is an integer number (3203979).

Almost surely, 2^18955253 is an apocalyptic number.

It is an amenable number.

18955253 is a deficient number, since it is larger than the sum of its proper divisors (268621).

18955253 is an frugal number, since it uses more digits than its factorization.

18955253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3703 (or 3630 counting only the distinct ones).

The product of its digits is 54000, while the sum is 38.

The square root of 18955253 is about 4353.7630849645. The cubic root of 18955253 is about 266.6305213162.

The spelling of 18955253 in words is "eighteen million, nine hundred fifty-five thousand, two hundred fifty-three".