20103090 has 64 divisors (see below), whose sum is σ = 57058560. Its totient is φ = 4435200.

The previous prime is 20103071. The next prime is 20103091. The reversal of 20103090 is 9030102.

20103090 = T₁₈₈ + T₁₈₉ + ... + T₅₀₂.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (20103091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4440 + ... + 7740.

It is an arithmetic number, because the mean of its divisors is an integer number (891540).

Almost surely, 2^20103090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20103090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28529280).

20103090 is an abundant number, since it is smaller than the sum of its proper divisors (36955470).

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

20103090 is a wasteful number, since it uses less digits than its factorization.

20103090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3347.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 20103090 is about 4483.6469530952. The cubic root of 20103090 is about 271.9073448108.

Adding to 20103090 its reverse (9030102), we get a palindrome (29133192).

The spelling of 20103090 in words is "twenty million, one hundred three thousand, ninety".