20052090 has 64 divisors (see below), whose sum is σ = 55814400. Its totient is φ = 5113152.

The previous prime is 20052077. The next prime is 20052091. The reversal of 20052090 is 9025002.

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

It is not an unprimeable number, because it can be changed into a prime (20052091) 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, 4596 + ... + 7824.

It is an arithmetic number, because the mean of its divisors is an integer number (872100).

Almost surely, 2^20052090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20052090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27907200).

20052090 is an abundant number, since it is smaller than the sum of its proper divisors (35762310).

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

20052090 is a wasteful number, since it uses less digits than its factorization.

20052090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3268 (or 3262 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 20052090 is about 4477.9560069299. The cubic root of 20052090 is about 271.6772140551.

Adding to 20052090 its reverse (9025002), we get a palindrome (29077092).

It can be divided in two parts, 2005 and 2090, that added together give a triangular number (4095 = T₉₀).

The spelling of 20052090 in words is "twenty million, fifty-two thousand, ninety".