20896149 has 4 divisors (see below), whose sum is σ = 27861536. Its totient is φ = 13930764.

The previous prime is 20896093. The next prime is 20896171. The reversal of 20896149 is 94169802.

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 not a de Polignac number, because 20896149 - 2¹⁷ = 20765077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20891149) 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, 3482689 + ... + 3482694.

It is an arithmetic number, because the mean of its divisors is an integer number (6965384).

Almost surely, 2^20896149 is an apocalyptic number.

It is an amenable number.

20896149 is a deficient number, since it is larger than the sum of its proper divisors (6965387).

20896149 is an equidigital number, since it uses as much as digits as its factorization.

20896149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6965386.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 20896149 is about 4571.2305783016. The cubic root of 20896149 is about 275.4368769407.

The spelling of 20896149 in words is "twenty million, eight hundred ninety-six thousand, one hundred forty-nine".