18780053 has 16 divisors (see below), whose sum is σ = 20752560. Its totient is φ = 16920576.

The previous prime is 18780043. The next prime is 18780059. The reversal of 18780053 is 35008781.

It can be written as a sum of positive squares in 8 ways, for example, as 6932689 + 11847364 = 2633^2 + 3442^2 .

It is not a de Polignac number, because 18780053 - 2⁶ = 18779989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18780059) 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, 45713 + ... + 46121.

It is an arithmetic number, because the mean of its divisors is an integer number (1297035).

Almost surely, 2^18780053 is an apocalyptic number.

It is an amenable number.

18780053 is a deficient number, since it is larger than the sum of its proper divisors (1972507).

18780053 is a wasteful number, since it uses less digits than its factorization.

18780053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 18780053 is about 4333.5958510226. The cubic root of 18780053 is about 265.8065046534.

The spelling of 18780053 in words is "eighteen million, seven hundred eighty thousand, fifty-three".