20955349 has 4 divisors (see below), whose sum is σ = 21631360. Its totient is φ = 20279340.

The previous prime is 20955343. The next prime is 20955367. The reversal of 20955349 is 94355902.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94355902 = 2 ⋅47177951.

It is a cyclic number.

It is not a de Polignac number, because 20955349 - 2¹¹ = 20953301 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 (20955343) 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, 337959 + ... + 338020.

It is an arithmetic number, because the mean of its divisors is an integer number (5407840).

Almost surely, 2^20955349 is an apocalyptic number.

It is an amenable number.

20955349 is a deficient number, since it is larger than the sum of its proper divisors (676011).

20955349 is an equidigital number, since it uses as much as digits as its factorization.

20955349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676010.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 20955349 is about 4577.7012790264. The cubic root of 20955349 is about 275.6967412314.

The spelling of 20955349 in words is "twenty million, nine hundred fifty-five thousand, three hundred forty-nine".