20899043 has 8 divisors (see below), whose sum is σ = 23415600. Its totient is φ = 18485280.

The previous prime is 20899037. The next prime is 20899049. The reversal of 20899043 is 34099802.

It is an interprime number because it is at equal distance from previous prime (20899037) and next prime (20899049).

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

It is not a de Polignac number, because 20899043 - 2²⁴ = 4121827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20898994 and 20899012.

It is not an unprimeable number, because it can be changed into a prime (20899049) 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, 25268 + ... + 26081.

It is an arithmetic number, because the mean of its divisors is an integer number (2926950).

Almost surely, 2^20899043 is an apocalyptic number.

20899043 is a deficient number, since it is larger than the sum of its proper divisors (2516557).

20899043 is a wasteful number, since it uses less digits than its factorization.

20899043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51397.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 20899043 is about 4571.5471123024. The cubic root of 20899043 is about 275.4495918437.

The spelling of 20899043 in words is "twenty million, eight hundred ninety-nine thousand, forty-three".