20678136 has 16 divisors (see below), whose sum is σ = 51695400. Its totient is φ = 6892704.

The previous prime is 20678123. The next prime is 20678149. The reversal of 20678136 is 63187602.

It is an interprime number because it is at equal distance from previous prime (20678123) and next prime (20678149).

It is a junction number, because it is equal to n+sod(n) for n = 20678097 and 20678106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430771 + ... + 430818.

Almost surely, 2^20678136 is an apocalyptic number.

It is an amenable number.

20678136 is an abundant number, since it is smaller than the sum of its proper divisors (31017264).

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

20678136 is a wasteful number, since it uses less digits than its factorization.

20678136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861598 (or 861594 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 20678136 is about 4547.3218491767. The cubic root of 20678136 is about 274.4756332862.

The spelling of 20678136 in words is "twenty million, six hundred seventy-eight thousand, one hundred thirty-six".