20788878 has 16 divisors (see below), whose sum is σ = 45357696. Its totient is φ = 6299640.

The previous prime is 20788877. The next prime is 20788903. The reversal of 20788878 is 87888702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20788877) 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, 157426 + ... + 157557.

It is an arithmetic number, because the mean of its divisors is an integer number (2834856).

Almost surely, 2^20788878 is an apocalyptic number.

20788878 is an abundant number, since it is smaller than the sum of its proper divisors (24568818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20788878 is a wasteful number, since it uses less digits than its factorization.

20788878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314999.

The product of its (nonzero) digits is 401408, while the sum is 48.

The square root of 20788878 is about 4559.4822074442. The cubic root of 20788878 is about 274.9647469962.

The spelling of 20788878 in words is "twenty million, seven hundred eighty-eight thousand, eight hundred seventy-eight".