20212490 has 16 divisors (see below), whose sum is σ = 38522952. Its totient is φ = 7609344.

The previous prime is 20212483. The next prime is 20212499. The reversal of 20212490 is 9421202.

It can be written as a sum of positive squares in 4 ways, for example, as 12666481 + 7546009 = 3559^2 + 2747^2 .

It is not an unprimeable number, because it can be changed into a prime (20212499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59279 + ... + 59618.

Almost surely, 2^20212490 is an apocalyptic number.

20212490 is a deficient number, since it is larger than the sum of its proper divisors (18310462).

20212490 is a wasteful number, since it uses less digits than its factorization.

20212490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118921.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 20212490 is about 4495.8302903913. The cubic root of 20212490 is about 272.3996881292.

Adding to 20212490 its reverse (9421202), we get a palindrome (29633692).

It can be divided in two parts, 20212 and 490, that added together give a palindrome (20702).

The spelling of 20212490 in words is "twenty million, two hundred twelve thousand, four hundred ninety".