20090502 has 24 divisors (see below), whose sum is σ = 43852536. Its totient is φ = 6647136.

The previous prime is 20090491. The next prime is 20090527. The reversal of 20090502 is 20509002.

It is a super-2 number, since 2×20090502² = 807256541224008, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1608 + ... + 6539.

It is an arithmetic number, because the mean of its divisors is an integer number (1827189).

Almost surely, 2^20090502 is an apocalyptic number.

20090502 is an abundant number, since it is smaller than the sum of its proper divisors (23762034).

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

20090502 is a wasteful number, since it uses less digits than its factorization.

20090502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8292 (or 8289 counting only the distinct ones).

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

The square root of 20090502 is about 4482.2429653021. The cubic root of 20090502 is about 271.8505793364.

Adding to 20090502 its reverse (20509002), we get a palindrome (40599504).

The spelling of 20090502 in words is "twenty million, ninety thousand, five hundred two".