20949603 has 8 divisors (see below), whose sum is σ = 28056768. Its totient is φ = 13904424.

The previous prime is 20949601. The next prime is 20949611. The reversal of 20949603 is 30694902.

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

It is not a de Polignac number, because 20949603 - 2¹ = 20949601 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20949601) 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, 14701 + ... + 16062.

It is an arithmetic number, because the mean of its divisors is an integer number (3507096).

Almost surely, 2^20949603 is an apocalyptic number.

20949603 is a deficient number, since it is larger than the sum of its proper divisors (7107165).

20949603 is a wasteful number, since it uses less digits than its factorization.

20949603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30993.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 20949603 is about 4577.0736284224. The cubic root of 20949603 is about 275.6715400558.

The spelling of 20949603 in words is "twenty million, nine hundred forty-nine thousand, six hundred three".