20955449 has 4 divisors (see below), whose sum is σ = 20982864. Its totient is φ = 20928036.

The previous prime is 20955439. The next prime is 20955457. The reversal of 20955449 is 94455902.

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 not a de Polignac number, because 20955449 - 2⁴ = 20955433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20955409) 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, 12527 + ... + 14100.

It is an arithmetic number, because the mean of its divisors is an integer number (5245716).

Almost surely, 2^20955449 is an apocalyptic number.

It is an amenable number.

20955449 is a deficient number, since it is larger than the sum of its proper divisors (27415).

20955449 is an equidigital number, since it uses as much as digits as its factorization.

20955449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27414.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 20955449 is about 4577.7122015260. The cubic root of 20955449 is about 275.6971797771.

The spelling of 20955449 in words is "twenty million, nine hundred fifty-five thousand, four hundred forty-nine".