20768878 has 16 divisors (see below), whose sum is σ = 34369776. Its totient is φ = 9351360.

The previous prime is 20768873. The next prime is 20768887. The reversal of 20768878 is 87886702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20768873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8676 + ... + 10807.

It is an arithmetic number, because the mean of its divisors is an integer number (2148111).

Almost surely, 2^20768878 is an apocalyptic number.

20768878 is a deficient number, since it is larger than the sum of its proper divisors (13600898).

20768878 is a wasteful number, since it uses less digits than its factorization.

20768878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19539.

The product of its (nonzero) digits is 301056, while the sum is 46.

The square root of 20768878 is about 4557.2884481893. The cubic root of 20768878 is about 274.8765418283.

The spelling of 20768878 in words is "twenty million, seven hundred sixty-eight thousand, eight hundred seventy-eight".