20113120 has 24 divisors (see below), whose sum is σ = 47517624. Its totient is φ = 8045184.

The previous prime is 20113099. The next prime is 20113123. The reversal of 20113120 is 2131102.

It is a super-2 number, since 2×20113120² = 809075192268800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20113097 and 20113106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62694 + ... + 63013.

It is an arithmetic number, because the mean of its divisors is an integer number (1979901).

Almost surely, 2^20113120 is an apocalyptic number.

20113120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20113120 is an abundant number, since it is smaller than the sum of its proper divisors (27404504).

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

20113120 is a wasteful number, since it uses less digits than its factorization.

20113120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125722 (or 125714 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 20113120 is about 4484.7653227343. The cubic root of 20113120 is about 271.9525580464.

Adding to 20113120 its reverse (2131102), we get a palindrome (22244222).

The spelling of 20113120 in words is "twenty million, one hundred thirteen thousand, one hundred twenty".