20331120 has 40 divisors (see below), whose sum is σ = 63027216. Its totient is φ = 5421568.

The previous prime is 20331109. The next prime is 20331127. The reversal of 20331120 is 2113302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20331096 and 20331105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42117 + ... + 42596.

Almost surely, 2^20331120 is an apocalyptic number.

20331120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20331120 is an abundant number, since it is smaller than the sum of its proper divisors (42696096).

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

20331120 is a wasteful number, since it uses less digits than its factorization.

20331120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84729 (or 84723 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 20331120 is about 4509.0043246819. The cubic root of 20331120 is about 272.9315665259.

Adding to 20331120 its reverse (2113302), we get a palindrome (22444422).

The spelling of 20331120 in words is "twenty million, three hundred thirty-one thousand, one hundred twenty".