20995849 has 8 divisors (see below), whose sum is σ = 25038720. Its totient is φ = 17213856.

The previous prime is 20995837. The next prime is 20995859. The reversal of 20995849 is 94859902.

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 20995849 - 2⁷ = 20995721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20995799 and 20995808.

It is not an unprimeable number, because it can be changed into a prime (20995859) 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, 65044 + ... + 65365.

It is an arithmetic number, because the mean of its divisors is an integer number (3129840).

Almost surely, 2^20995849 is an apocalyptic number.

It is an amenable number.

20995849 is a deficient number, since it is larger than the sum of its proper divisors (4042871).

20995849 is a wasteful number, since it uses less digits than its factorization.

20995849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130439.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 20995849 is about 4582.1227613411. The cubic root of 20995849 is about 275.8742381954.

The spelling of 20995849 in words is "twenty million, nine hundred ninety-five thousand, eight hundred forty-nine".