20103390 has 48 divisors (see below), whose sum is σ = 54211248. Its totient is φ = 5360256.

The previous prime is 20103383. The next prime is 20103427. The reversal of 20103390 is 9330102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1707 + ... + 6566.

It is an arithmetic number, because the mean of its divisors is an integer number (1129401).

Almost surely, 2^20103390 is an apocalyptic number.

20103390 is an abundant number, since it is smaller than the sum of its proper divisors (34107858).

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

20103390 is an equidigital number, since it uses as much as digits as its factorization.

20103390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8295 (or 8283 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 20103390 is about 4483.6804078792. The cubic root of 20103390 is about 271.9086973690.

Adding to 20103390 its reverse (9330102), we get a palindrome (29433492).

The spelling of 20103390 in words is "twenty million, one hundred three thousand, three hundred ninety".