20698078 has 8 divisors (see below), whose sum is σ = 32873472. Its totient is φ = 9740256.

The previous prime is 20698063. The next prime is 20698081. The reversal of 20698078 is 87089602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20698078.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 304350 + ... + 304417.

It is an arithmetic number, because the mean of its divisors is an integer number (4109184).

Almost surely, 2^20698078 is an apocalyptic number.

20698078 is a deficient number, since it is larger than the sum of its proper divisors (12175394).

20698078 is a wasteful number, since it uses less digits than its factorization.

20698078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608786.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 20698078 is about 4549.5140399827. The cubic root of 20698078 is about 274.5638397287.

The spelling of 20698078 in words is "twenty million, six hundred ninety-eight thousand, seventy-eight".