18486205440 has 352 divisors, whose sum is σ = 62537978880. Its totient is φ = 4653121536.

The previous prime is 18486205427. The next prime is 18486205453. The reversal of 18486205440 is 4450268481.

It is an interprime number because it is at equal distance from previous prime (18486205427) and next prime (18486205453).

It is a junction number, because it is equal to n+sod(n) for n = 18486205392 and 18486205401.

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, 20935239 + ... + 20936121.

Almost surely, 2^18486205440 is an apocalyptic number.

18486205440 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 18486205440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31268989440).

18486205440 is an abundant number, since it is smaller than the sum of its proper divisors (44051773440).

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

18486205440 is a wasteful number, since it uses less digits than its factorization.

18486205440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 969 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 42.

The spelling of 18486205440 in words is "eighteen billion, four hundred eighty-six million, two hundred five thousand, four hundred forty".