20673381 has 8 divisors (see below), whose sum is σ = 27942400. Its totient is φ = 13593312.

The previous prime is 20673379. The next prime is 20673397. The reversal of 20673381 is 18337602.

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

It is not a de Polignac number, because 20673381 - 2¹ = 20673379 is a prime.

It is a super-2 number, since 2×20673381² = 854777363942322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20673361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46981 + ... + 47418.

It is an arithmetic number, because the mean of its divisors is an integer number (3492800).

Almost surely, 2^20673381 is an apocalyptic number.

It is an amenable number.

20673381 is a deficient number, since it is larger than the sum of its proper divisors (7269019).

20673381 is an equidigital number, since it uses as much as digits as its factorization.

20673381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94475.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20673381 is about 4546.7989839007. The cubic root of 20673381 is about 274.4545928390.

The spelling of 20673381 in words is "twenty million, six hundred seventy-three thousand, three hundred eighty-one".