20336490 has 24 divisors (see below), whose sum is σ = 52875108. Its totient is φ = 5423040.

The previous prime is 20336483. The next prime is 20336513. The reversal of 20336490 is 9463302.

It can be written as a sum of positive squares in 2 ways, for example, as 17214201 + 3122289 = 4149^2 + 1767^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112891 + ... + 113070.

Almost surely, 2^20336490 is an apocalyptic number.

20336490 is an abundant number, since it is smaller than the sum of its proper divisors (32538618).

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

20336490 is a wasteful number, since it uses less digits than its factorization.

20336490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225974 (or 225971 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 20336490 is about 4509.5997605109. The cubic root of 20336490 is about 272.9555939527.

Adding to 20336490 its reverse (9463302), we get a palindrome (29799792).

The spelling of 20336490 in words is "twenty million, three hundred thirty-six thousand, four hundred ninety".