20940899 has 8 divisors (see below), whose sum is σ = 24202080. Its totient is φ = 17747136.

The previous prime is 20940877. The next prime is 20940901. The reversal of 20940899 is 99804902.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20940899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20940809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16184 + ... + 17429.

It is an arithmetic number, because the mean of its divisors is an integer number (3025260).

Almost surely, 2^20940899 is an apocalyptic number.

20940899 is a deficient number, since it is larger than the sum of its proper divisors (3261181).

20940899 is an equidigital number, since it uses as much as digits as its factorization.

20940899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33709.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 20940899 is about 4576.1227037745. The cubic root of 20940899 is about 275.6333567155.

The spelling of 20940899 in words is "twenty million, nine hundred forty thousand, eight hundred ninety-nine".