20290050 has 72 divisors (see below), whose sum is σ = 59482800. Its totient is φ = 4917600.

The previous prime is 20290037. The next prime is 20290051. The reversal of 20290050 is 5009202.

It is a super-2 number, since 2×20290050² = 823372258005000, which contains 22 as substring.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20290051) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2901 + ... + 6999.

It is an arithmetic number, because the mean of its divisors is an integer number (826150).

Almost surely, 2^20290050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20290050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29741400).

20290050 is an abundant number, since it is smaller than the sum of its proper divisors (39192750).

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

20290050 is a wasteful number, since it uses less digits than its factorization.

20290050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4128 (or 4120 counting only the distinct ones).

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

The square root of 20290050 is about 4504.4478018954. The cubic root of 20290050 is about 272.7476636269.

Adding to 20290050 its reverse (5009202), we get a palindrome (25299252).

The spelling of 20290050 in words is "twenty million, two hundred ninety thousand, fifty".