20814678 has 32 divisors (see below), whose sum is σ = 48268800. Its totient is φ = 6636168.

The previous prime is 20814659. The next prime is 20814679. The reversal of 20814678 is 87641802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20814679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7138 + ... + 9621.

It is an arithmetic number, because the mean of its divisors is an integer number (1508400).

Almost surely, 2^20814678 is an apocalyptic number.

20814678 is an abundant number, since it is smaller than the sum of its proper divisors (27454122).

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

20814678 is a wasteful number, since it uses less digits than its factorization.

20814678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16793 (or 16787 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 20814678 is about 4562.3105988085. The cubic root of 20814678 is about 275.0784481427.

The spelling of 20814678 in words is "twenty million, eight hundred fourteen thousand, six hundred seventy-eight".