20678238 has 24 divisors (see below), whose sum is σ = 51203568. Its totient is φ = 5908032.

The previous prime is 20678197. The next prime is 20678263. The reversal of 20678238 is 83287602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81931 + ... + 82182.

It is an arithmetic number, because the mean of its divisors is an integer number (2133482).

Almost surely, 2^20678238 is an apocalyptic number.

20678238 is an abundant number, since it is smaller than the sum of its proper divisors (30525330).

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

20678238 is a wasteful number, since it uses less digits than its factorization.

20678238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164128 (or 164125 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 20678238 is about 4547.3330645555. Note that the first 3 decimals coincide. The cubic root of 20678238 is about 274.4760845917.

The spelling of 20678238 in words is "twenty million, six hundred seventy-eight thousand, two hundred thirty-eight".