20955299 has 4 divisors (see below), whose sum is σ = 21350736. Its totient is φ = 20559864.

The previous prime is 20955293. The next prime is 20955331. The reversal of 20955299 is 99255902.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20955299 - 2¹⁶ = 20889763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20955293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197639 + ... + 197744.

It is an arithmetic number, because the mean of its divisors is an integer number (5337684).

Almost surely, 2^20955299 is an apocalyptic number.

20955299 is a deficient number, since it is larger than the sum of its proper divisors (395437).

20955299 is an equidigital number, since it uses as much as digits as its factorization.

20955299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395436.

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 20955299 is about 4577.6958177668. The cubic root of 20955299 is about 275.6965219581.

The spelling of 20955299 in words is "twenty million, nine hundred fifty-five thousand, two hundred ninety-nine".