10818887920 has 40 divisors (see below), whose sum is σ = 25304567904. Its totient is φ = 4301636352.

The previous prime is 10818887909. The next prime is 10818887921. The reversal of 10818887920 is 2978881801.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10818887921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391539 + ... + 418258.

Almost surely, 2^10818887920 is an apocalyptic number.

10818887920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10818887920 is an abundant number, since it is smaller than the sum of its proper divisors (14485679984).

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

10818887920 is a wasteful number, since it uses less digits than its factorization.

10818887920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809977 (or 809971 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 52.

The spelling of 10818887920 in words is "ten billion, eight hundred eighteen million, eight hundred eighty-seven thousand, nine hundred twenty".