20452090 has 16 divisors (see below), whose sum is σ = 37670688. Its totient is φ = 7990416.

The previous prime is 20452079. The next prime is 20452093. The reversal of 20452090 is 9025402.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20452093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23352 + ... + 24211.

It is an arithmetic number, because the mean of its divisors is an integer number (2354418).

Almost surely, 2^20452090 is an apocalyptic number.

20452090 is a deficient number, since it is larger than the sum of its proper divisors (17218598).

20452090 is a wasteful number, since it uses less digits than its factorization.

20452090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47613.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20452090 is about 4522.3986998052. The cubic root of 20452090 is about 273.4718099968.

Adding to 20452090 its reverse (9025402), we get a palindrome (29477492).

The spelling of 20452090 in words is "twenty million, four hundred fifty-two thousand, ninety".