20550878 has 8 divisors (see below), whose sum is σ = 30847368. Its totient is φ = 10268424.

The previous prime is 20550863. The next prime is 20550911. The reversal of 20550878 is 87805502.

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

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, 1700 + ... + 6632.

It is an arithmetic number, because the mean of its divisors is an integer number (3855921).

Almost surely, 2^20550878 is an apocalyptic number.

20550878 is a deficient number, since it is larger than the sum of its proper divisors (10296490).

20550878 is a wasteful number, since it uses less digits than its factorization.

20550878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7018.

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 20550878 is about 4533.3076224761. The cubic root of 20550878 is about 273.9114122125.

The spelling of 20550878 in words is "twenty million, five hundred fifty thousand, eight hundred seventy-eight".