20442250 has 16 divisors (see below), whose sum is σ = 38268360. Its totient is φ = 8176800.

The previous prime is 20442203. The next prime is 20442269. The reversal of 20442250 is 5224402.

It can be written as a sum of positive squares in 4 ways, for example, as 2692881 + 17749369 = 1641^2 + 4213^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40635 + ... + 41134.

Almost surely, 2^20442250 is an apocalyptic number.

20442250 is a deficient number, since it is larger than the sum of its proper divisors (17826110).

20442250 is an equidigital number, since it uses as much as digits as its factorization.

20442250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81786 (or 81776 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 20442250 is about 4521.3106506853. The cubic root of 20442250 is about 273.4279449722.

Adding to 20442250 its reverse (5224402), we get a palindrome (25666652).

It can be divided in two parts, 20 and 442250, that added together give a triangular number (442270 = T₉₄₀).

The spelling of 20442250 in words is "twenty million, four hundred forty-two thousand, two hundred fifty".