20090492 has 12 divisors (see below), whose sum is σ = 36016176. Its totient is φ = 9800160.

The previous prime is 20090491. The next prime is 20090527. The reversal of 20090492 is 29409002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20090491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61088 + ... + 61415.

It is an arithmetic number, because the mean of its divisors is an integer number (3001348).

Almost surely, 2^20090492 is an apocalyptic number.

It is an amenable number.

20090492 is a deficient number, since it is larger than the sum of its proper divisors (15925684).

20090492 is a wasteful number, since it uses less digits than its factorization.

20090492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122548 (or 122546 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 20090492 is about 4482.2418497890. The cubic root of 20090492 is about 271.8505342321.

Adding to 20090492 its reverse (29409002), we get a palindrome (49499494).

The spelling of 20090492 in words is "twenty million, ninety thousand, four hundred ninety-two".