20673894 has 8 divisors (see below), whose sum is σ = 41347800. Its totient is φ = 6891296.

The previous prime is 20673893. The next prime is 20673907. The reversal of 20673894 is 49837602.

It is a sphenic number, since it is the product of 3 distinct primes.

20673894 is an admirable number.

It is a super-3 number, since 3×20673894³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20673893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1722819 + ... + 1722830.

It is an arithmetic number, because the mean of its divisors is an integer number (5168475).

Almost surely, 2^20673894 is an apocalyptic number.

20673894 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20673894 is a wasteful number, since it uses less digits than its factorization.

20673894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3445654.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 20673894 is about 4546.8553968650. The cubic root of 20673894 is about 274.4568629731.

The spelling of 20673894 in words is "twenty million, six hundred seventy-three thousand, eight hundred ninety-four".