20827642 has 16 divisors (see below), whose sum is σ = 34152192. Its totient is φ = 9447520.

The previous prime is 20827613. The next prime is 20827663. The reversal of 20827642 is 24672802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18438 + ... + 19534.

It is an arithmetic number, because the mean of its divisors is an integer number (2134512).

Almost surely, 2^20827642 is an apocalyptic number.

20827642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20827642 is a deficient number, since it is larger than the sum of its proper divisors (13324550).

20827642 is a wasteful number, since it uses less digits than its factorization.

20827642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 20827642 is about 4563.7311489613. The cubic root of 20827642 is about 275.1355453010.

The spelling of 20827642 in words is "twenty million, eight hundred twenty-seven thousand, six hundred forty-two".