20103120 has 160 divisors (see below), whose sum is σ = 71245440. Its totient is φ = 5207040.

The previous prime is 20103113. The next prime is 20103137. The reversal of 20103120 is 2130102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88447 + ... + 88673.

It is an arithmetic number, because the mean of its divisors is an integer number (445284).

Almost surely, 2^20103120 is an apocalyptic number.

20103120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20103120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35622720).

20103120 is an abundant number, since it is smaller than the sum of its proper divisors (51142320).

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

20103120 is a wasteful number, since it uses less digits than its factorization.

20103120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20103120 is about 4483.6502985848. The cubic root of 20103120 is about 271.9074800672.

Adding to 20103120 its reverse (2130102), we get a palindrome (22233222).

The spelling of 20103120 in words is "twenty million, one hundred three thousand, one hundred twenty".