18520270653 has 16 divisors (see below), whose sum is σ = 26306542080. Its totient is φ = 11556082224.

The previous prime is 18520270631. The next prime is 18520270663. The reversal of 18520270653 is 35607202581.

It is not a de Polignac number, because 18520270653 - 2⁸ = 18520270397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18520270603) 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, 1952601 + ... + 1962062.

It is an arithmetic number, because the mean of its divisors is an integer number (1644158880).

Almost surely, 2^18520270653 is an apocalyptic number.

It is an amenable number.

18520270653 is a deficient number, since it is larger than the sum of its proper divisors (7786271427).

18520270653 is a wasteful number, since it uses less digits than its factorization.

18520270653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3914768.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 18520270653 in words is "eighteen billion, five hundred twenty million, two hundred seventy thousand, six hundred fifty-three".