20540992 has 14 divisors (see below), whose sum is σ = 40761158. Its totient is φ = 10270464.

The previous prime is 20540977. The next prime is 20540999. The reversal of 20540992 is 29904502.

It can be written as a sum of positive squares in only one way, i.e., 18181696 + 2359296 = 4264^2 + 1536^2 .

It is not an unprimeable number, because it can be changed into a prime (20540999) 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 as a sum of consecutive naturals, namely, 160413 + ... + 160540.

Almost surely, 2^20540992 is an apocalyptic number.

It is an amenable number.

20540992 is a deficient number, since it is larger than the sum of its proper divisors (20220166).

20540992 is an equidigital number, since it uses as much as digits as its factorization.

20540992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320965 (or 320955 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 20540992 is about 4532.2171174823. The cubic root of 20540992 is about 273.8674834723.

The spelling of 20540992 in words is "twenty million, five hundred forty thousand, nine hundred ninety-two".