20116949 has 4 divisors (see below), whose sum is σ = 20136480. Its totient is φ = 20097420.

The previous prime is 20116939. The next prime is 20116961. The reversal of 20116949 is 94961102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20116949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20116909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8129 + ... + 10310.

It is an arithmetic number, because the mean of its divisors is an integer number (5034120).

Almost surely, 2^20116949 is an apocalyptic number.

It is an amenable number.

20116949 is a deficient number, since it is larger than the sum of its proper divisors (19531).

20116949 is a wasteful number, since it uses less digits than its factorization.

20116949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19530.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 20116949 is about 4485.1921920917. The cubic root of 20116949 is about 271.9698144487.

The spelling of 20116949 in words is "twenty million, one hundred sixteen thousand, nine hundred forty-nine".