20893403 has 8 divisors (see below), whose sum is σ = 21326208. Its totient is φ = 20464704.

The previous prime is 20893393. The next prime is 20893423. The reversal of 20893403 is 30439802.

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 20893403 - 2⁴ = 20893387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20893423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10550 + ... + 12372.

It is an arithmetic number, because the mean of its divisors is an integer number (2665776).

Almost surely, 2^20893403 is an apocalyptic number.

20893403 is a deficient number, since it is larger than the sum of its proper divisors (432805).

20893403 is a wasteful number, since it uses less digits than its factorization.

20893403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20893403 is about 4570.9302116746. The cubic root of 20893403 is about 275.4248111959.

The spelling of 20893403 in words is "twenty million, eight hundred ninety-three thousand, four hundred three".