20250090 has 48 divisors (see below), whose sum is σ = 60173568. Its totient is φ = 4628448.

The previous prime is 20250089. The next prime is 20250101. The reversal of 20250090 is 9005202.

It is a super-2 number, since 2×20250090² = 820132290016200, which contains 22 as substring.

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

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, 15442 + ... + 16701.

It is an arithmetic number, because the mean of its divisors is an integer number (1253616).

Almost surely, 2^20250090 is an apocalyptic number.

20250090 is an abundant number, since it is smaller than the sum of its proper divisors (39923478).

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

20250090 is a wasteful number, since it uses less digits than its factorization.

20250090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32163 (or 32160 counting only the distinct ones).

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

The square root of 20250090 is about 4500.0099999889. The cubic root of 20250090 is about 272.5684927288.

Adding to 20250090 its reverse (9005202), we get a palindrome (29255292).

The spelling of 20250090 in words is "twenty million, two hundred fifty thousand, ninety".