20674878 has 32 divisors (see below), whose sum is σ = 47796480. Its totient is φ = 5839680.

The previous prime is 20674867. The next prime is 20674919. The reversal of 20674878 is 87847602.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 973 + ... + 6503.

It is an arithmetic number, because the mean of its divisors is an integer number (1493640).

Almost surely, 2^20674878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20674878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23898240).

20674878 is an abundant number, since it is smaller than the sum of its proper divisors (27121602).

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

20674878 is a wasteful number, since it uses less digits than its factorization.

20674878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5632.

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

The square root of 20674878 is about 4546.9636022295. The cubic root of 20674878 is about 274.4612172772.

The spelling of 20674878 in words is "twenty million, six hundred seventy-four thousand, eight hundred seventy-eight".