20779078 has 8 divisors (see below), whose sum is σ = 31194360. Its totient is φ = 10380960.

The previous prime is 20779063. The next prime is 20779091. The reversal of 20779078 is 87097702.

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 20779078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643 + ... + 6478.

It is an arithmetic number, because the mean of its divisors is an integer number (3899295).

Almost surely, 2^20779078 is an apocalyptic number.

20779078 is a deficient number, since it is larger than the sum of its proper divisors (10415282).

20779078 is a wasteful number, since it uses less digits than its factorization.

20779078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8582.

The product of its (nonzero) digits is 49392, while the sum is 40.

The square root of 20779078 is about 4558.4073973264. The cubic root of 20779078 is about 274.9215335360.

The spelling of 20779078 in words is "twenty million, seven hundred seventy-nine thousand, seventy-eight".