13111551020 has 24 divisors (see below), whose sum is σ = 27791591184. Its totient is φ = 5195604416.

The previous prime is 13111551017. The next prime is 13111551059. The reversal of 13111551020 is 2015511131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13111550983 and 13111551001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3061307 + ... + 3065586.

It is an arithmetic number, because the mean of its divisors is an integer number (1157982966).

Almost surely, 2^13111551020 is an apocalyptic number.

13111551020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13111551020 is an abundant number, since it is smaller than the sum of its proper divisors (14680040164).

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

13111551020 is a wasteful number, since it uses less digits than its factorization.

13111551020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6127009 (or 6127007 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 20.

The spelling of 13111551020 in words is "thirteen billion, one hundred eleven million, five hundred fifty-one thousand, twenty".