20678364 has 72 divisors (see below), whose sum is σ = 61687808. Its totient is φ = 5715360.

The previous prime is 20678353. The next prime is 20678381. The reversal of 20678364 is 46387602.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6489 + ... + 9135.

Almost surely, 2^20678364 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20678364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30843904).

20678364 is an abundant number, since it is smaller than the sum of its proper divisors (41009444).

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

20678364 is a wasteful number, since it uses less digits than its factorization.

20678364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695 (or 2690 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 20678364 is about 4547.3469188088. The cubic root of 20678364 is about 274.4766420847.

The spelling of 20678364 in words is "twenty million, six hundred seventy-eight thousand, three hundred sixty-four".