20214678 has 32 divisors (see below), whose sum is σ = 44674560. Its totient is φ = 6046560.

The previous prime is 20214673. The next prime is 20214707. The reversal of 20214678 is 87641202.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20214673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3276 + ... + 7152.

It is an arithmetic number, because the mean of its divisors is an integer number (1396080).

Almost surely, 2^20214678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20214678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22337280).

20214678 is an abundant number, since it is smaller than the sum of its proper divisors (24459882).

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

20214678 is a wasteful number, since it uses less digits than its factorization.

20214678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3972.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 20214678 is about 4496.0736203937. The cubic root of 20214678 is about 272.4095168542.

The spelling of 20214678 in words is "twenty million, two hundred fourteen thousand, six hundred seventy-eight".