18461531010 has 64 divisors (see below), whose sum is σ = 47775611520. Its totient is φ = 4538695680.

The previous prime is 18461530999. The next prime is 18461531047. The reversal of 18461531010 is 1013516481.

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

It is a Curzon 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, 287106 + ... + 345474.

It is an arithmetic number, because the mean of its divisors is an integer number (746493930).

Almost surely, 2^18461531010 is an apocalyptic number.

18461531010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18461531010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23887805760).

18461531010 is an abundant number, since it is smaller than the sum of its proper divisors (29314080510).

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

18461531010 is a wasteful number, since it uses less digits than its factorization.

18461531010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59203.

The product of its (nonzero) digits is 2880, while the sum is 30.

The spelling of 18461531010 in words is "eighteen billion, four hundred sixty-one million, five hundred thirty-one thousand, ten".