18953856 has 48 divisors (see below), whose sum is σ = 54545010. Its totient is φ = 6317568.

The previous prime is 18953839. The next prime is 18953867. The reversal of 18953856 is 65835981.

It can be written as a sum of positive squares in only one way, i.e., 12110400 + 6843456 = 3480^2 + 2616^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7075 + ... + 9378.

Almost surely, 2^18953856 is an apocalyptic number.

18953856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18953856 is an abundant number, since it is smaller than the sum of its proper divisors (35591154).

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

18953856 is a wasteful number, since it uses less digits than its factorization.

18953856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16473 (or 16458 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 18953856 is about 4353.6026460852. The cubic root of 18953856 is about 266.6239709422.

It can be divided in two parts, 189 and 53856, that added together give a palindrome (54045).

The spelling of 18953856 in words is "eighteen million, nine hundred fifty-three thousand, eight hundred fifty-six".