20381120 has 28 divisors (see below), whose sum is σ = 48533304. Its totient is φ = 8152320.

The previous prime is 20381107. The next prime is 20381149. The reversal of 20381120 is 2118302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31526 + ... + 32165.

Almost surely, 2^20381120 is an apocalyptic number.

20381120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20381120 is an abundant number, since it is smaller than the sum of its proper divisors (28152184).

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

20381120 is an equidigital number, since it uses as much as digits as its factorization.

20381120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63708 (or 63698 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 20381120 is about 4514.5453813202. The cubic root of 20381120 is about 273.1551221170.

Adding to 20381120 its reverse (2118302), we get a palindrome (22499422).

The spelling of 20381120 in words is "twenty million, three hundred eighty-one thousand, one hundred twenty".