20673899 has 8 divisors (see below), whose sum is σ = 21060000. Its totient is φ = 20291392.

The previous prime is 20673893. The next prime is 20673907. The reversal of 20673899 is 99837602.

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

It is a cyclic number.

It is not a de Polignac number, because 20673899 - 2⁴ = 20673883 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 12482 + ... + 14040.

It is an arithmetic number, because the mean of its divisors is an integer number (2632500).

Almost surely, 2^20673899 is an apocalyptic number.

20673899 is a deficient number, since it is larger than the sum of its proper divisors (386101).

20673899 is a wasteful number, since it uses less digits than its factorization.

20673899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 20673899 is about 4546.8559466955. The cubic root of 20673899 is about 274.4568850989.

The spelling of 20673899 in words is "twenty million, six hundred seventy-three thousand, eight hundred ninety-nine".