11109403920 has 160 divisors (see below), whose sum is σ = 35798458752. Its totient is φ = 2847522816.

The previous prime is 11109403919. The next prime is 11109403937. The reversal of 11109403920 is 2930490111.

It is a super-2 number, since 2×11109403920² (a number of 21 digits) contains 22 as substring.

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

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, 729504 + ... + 744576.

Almost surely, 2^11109403920 is an apocalyptic number.

11109403920 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 11109403920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17899229376).

11109403920 is an abundant number, since it is smaller than the sum of its proper divisors (24689054832).

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

11109403920 is a wasteful number, since it uses less digits than its factorization.

11109403920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15209 (or 15203 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The spelling of 11109403920 in words is "eleven billion, one hundred nine million, four hundred three thousand, nine hundred twenty".