53400018 has 16 divisors (see below), whose sum is σ = 122057280. Its totient is φ = 15257136.

The previous prime is 53400001. The next prime is 53400059. The reversal of 53400018 is 81000435.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 53399967 and 53400003.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635673 + ... + 635756.

It is an arithmetic number, because the mean of its divisors is an integer number (7628580).

Almost surely, 2^53400018 is an apocalyptic number.

53400018 is an abundant number, since it is smaller than the sum of its proper divisors (68657262).

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

53400018 is a wasteful number, since it uses less digits than its factorization.

53400018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271441.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 53400018 is about 7307.5315941842. The cubic root of 53400018 is about 376.5712278975.

The spelling of 53400018 in words is "fifty-three million, four hundred thousand, eighteen".