20400794 has 16 divisors (see below), whose sum is σ = 32503680. Its totient is φ = 9576000.

The previous prime is 20400719. The next prime is 20400803. The reversal of 20400794 is 49700402.

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 7 ways as a sum of consecutive naturals, for example, 1919 + ... + 6669.

It is an arithmetic number, because the mean of its divisors is an integer number (2031480).

Almost surely, 2^20400794 is an apocalyptic number.

20400794 is a deficient number, since it is larger than the sum of its proper divisors (12102886).

20400794 is a wasteful number, since it uses less digits than its factorization.

20400794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4885.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20400794 is about 4516.7238126766. The cubic root of 20400794 is about 273.2429865327.

The spelling of 20400794 in words is "twenty million, four hundred thousand, seven hundred ninety-four".