20467878 has 8 divisors (see below), whose sum is σ = 40935768. Its totient is φ = 6822624.

The previous prime is 20467877. The next prime is 20467891. The reversal of 20467878 is 87876402.

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

20467878 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20467877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1705651 + ... + 1705662.

It is an arithmetic number, because the mean of its divisors is an integer number (5116971).

Almost surely, 2^20467878 is an apocalyptic number.

20467878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20467878 is a wasteful number, since it uses less digits than its factorization.

20467878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3411318.

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 20467878 is about 4524.1438969157. The cubic root of 20467878 is about 273.5421607927.

The spelling of 20467878 in words is "twenty million, four hundred sixty-seven thousand, eight hundred seventy-eight".