9402181812 has 48 divisors (see below), whose sum is σ = 24410131200. Its totient is φ = 3129675840.

The previous prime is 9402181783. The next prime is 9402181829. The reversal of 9402181812 is 2181812049.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17112 + ... + 138192.

It is an arithmetic number, because the mean of its divisors is an integer number (508544400).

Almost surely, 2^9402181812 is an apocalyptic number.

It is an amenable number.

9402181812 is an abundant number, since it is smaller than the sum of its proper divisors (15007949388).

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

9402181812 is a wasteful number, since it uses less digits than its factorization.

9402181812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121813 (or 121805 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 9402181812 is about 96964.8483317537. The cubic root of 9402181812 is about 2110.6175660609.

The spelling of 9402181812 in words is "nine billion, four hundred two million, one hundred eighty-one thousand, eight hundred twelve".