20304746 has 16 divisors (see below), whose sum is σ = 37972800. Its totient is φ = 7910880.

The previous prime is 20304733. The next prime is 20304751. The reversal of 20304746 is 64740302.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65771 + ... + 66078.

It is an arithmetic number, because the mean of its divisors is an integer number (2373300).

Almost surely, 2^20304746 is an apocalyptic number.

20304746 is a deficient number, since it is larger than the sum of its proper divisors (17668054).

20304746 is a wasteful number, since it uses less digits than its factorization.

20304746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131869.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 20304746 is about 4506.0787831550. The cubic root of 20304746 is about 272.8134977397.

Subtracting 20304746 from its reverse (64740302), we obtain a square (44435556 = 6666²).

It can be divided in two parts, 2030 and 4746, that added together give a palindrome (6776).

The spelling of 20304746 in words is "twenty million, three hundred four thousand, seven hundred forty-six".