18013563975 has 24 divisors (see below), whose sum is σ = 32489920512. Its totient is φ = 8733848800.

The previous prime is 18013563929. The next prime is 18013563977. The reversal of 18013563975 is 57936531081.

It is not a de Polignac number, because 18013563975 - 2¹¹ = 18013561927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18013563977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10916487 + ... + 10918136.

It is an arithmetic number, because the mean of its divisors is an integer number (1353746688).

Almost surely, 2^18013563975 is an apocalyptic number.

18013563975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18013563975 is a deficient number, since it is larger than the sum of its proper divisors (14476356537).

18013563975 is a wasteful number, since it uses less digits than its factorization.

18013563975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21834647 (or 21834642 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 48.

The spelling of 18013563975 in words is "eighteen billion, thirteen million, five hundred sixty-three thousand, nine hundred seventy-five".