18201756053 has 4 divisors (see below), whose sum is σ = 19601891148. Its totient is φ = 16801620960.

The previous prime is 18201756047. The next prime is 18201756091. The reversal of 18201756053 is 35065710281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8365480369 + 9836275684 = 91463^2 + 99178^2 .

It is a cyclic number.

It is not a de Polignac number, because 18201756053 - 2⁸ = 18201755797 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18201755998 and 18201756016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18201756043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700067528 + ... + 700067553.

It is an arithmetic number, because the mean of its divisors is an integer number (4900472787).

Almost surely, 2^18201756053 is an apocalyptic number.

18201756053 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18201756053 is a deficient number, since it is larger than the sum of its proper divisors (1400135095).

18201756053 is a wasteful number, since it uses less digits than its factorization.

18201756053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400135094.

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 18201756053 in words is "eighteen billion, two hundred one million, seven hundred fifty-six thousand, fifty-three".