20320678 has 16 divisors (see below), whose sum is σ = 36885024. Its totient is φ = 8196480.

The previous prime is 20320669. The next prime is 20320687. The reversal of 20320678 is 87602302.

It is an interprime number because it is at equal distance from previous prime (20320669) and next prime (20320687).

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 42453 + ... + 42928.

It is an arithmetic number, because the mean of its divisors is an integer number (2305314).

Almost surely, 2^20320678 is an apocalyptic number.

20320678 is a deficient number, since it is larger than the sum of its proper divisors (16564346).

20320678 is a wasteful number, since it uses less digits than its factorization.

20320678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85407.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20320678 is about 4507.8462706707. The cubic root of 20320678 is about 272.8848329230.

The spelling of 20320678 in words is "twenty million, three hundred twenty thousand, six hundred seventy-eight".