2113193820 has 48 divisors (see below), whose sum is σ = 5920070688. Its totient is φ = 563220480.

The previous prime is 2113193801. The next prime is 2113193843. The reversal of 2113193820 is 283913112.

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

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, 119980 + ... + 136460.

It is an arithmetic number, because the mean of its divisors is an integer number (123334806).

Almost surely, 2^2113193820 is an apocalyptic number.

2113193820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2113193820 is an abundant number, since it is smaller than the sum of its proper divisors (3806876868).

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

2113193820 is a wasteful number, since it uses less digits than its factorization.

2113193820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18630 (or 18628 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 2113193820 is about 45969.4879240568. The cubic root of 2113193820 is about 1283.2554300643.

The spelling of 2113193820 in words is "two billion, one hundred thirteen million, one hundred ninety-three thousand, eight hundred twenty".