18121018260 has 96 divisors (see below), whose sum is σ = 51881679360. Its totient is φ = 4723683328.

The previous prime is 18121018259. The next prime is 18121018291. The reversal of 18121018260 is 6281012181.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2616322 + ... + 2623238.

It is an arithmetic number, because the mean of its divisors is an integer number (540434160).

Almost surely, 2^18121018260 is an apocalyptic number.

18121018260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18121018260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25940839680).

18121018260 is an abundant number, since it is smaller than the sum of its proper divisors (33760661100).

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

18121018260 is a wasteful number, since it uses less digits than its factorization.

18121018260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7905 (or 7903 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 30.

The spelling of 18121018260 in words is "eighteen billion, one hundred twenty-one million, eighteen thousand, two hundred sixty".