20320090 has 32 divisors (see below), whose sum is σ = 41975424. Its totient is φ = 6937920.

The previous prime is 20320073. The next prime is 20320103. The reversal of 20320090 is 9002302.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22732 + ... + 23608.

It is an arithmetic number, because the mean of its divisors is an integer number (1311732).

Almost surely, 2^20320090 is an apocalyptic number.

20320090 is an abundant number, since it is smaller than the sum of its proper divisors (21655334).

20320090 is a wasteful number, since it uses less digits than its factorization.

20320090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 20320090 is about 4507.7810505835. The cubic root of 20320090 is about 272.8822008286.

Adding to 20320090 its reverse (9002302), we get a palindrome (29322392).

The spelling of 20320090 in words is "twenty million, three hundred twenty thousand, ninety".