10218985940 has 24 divisors (see below), whose sum is σ = 22722216552. Its totient is φ = 3847147520.

The previous prime is 10218985939. The next prime is 10218985961. The reversal of 10218985940 is 4958981201.

It can be written as a sum of positive squares in 4 ways, for example, as 925254724 + 9293731216 = 30418^2 + 96404^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15027581 + ... + 15028260.

It is an arithmetic number, because the mean of its divisors is an integer number (946759023).

Almost surely, 2^10218985940 is an apocalyptic number.

10218985940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10218985940 is an abundant number, since it is smaller than the sum of its proper divisors (12503230612).

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

10218985940 is a wasteful number, since it uses less digits than its factorization.

10218985940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30055867 (or 30055865 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 47.

The spelling of 10218985940 in words is "ten billion, two hundred eighteen million, nine hundred eighty-five thousand, nine hundred forty".