20955361 has 8 divisors (see below), whose sum is σ = 24074624. Its totient is φ = 17867520.

The previous prime is 20955343. The next prime is 20955367. The reversal of 20955361 is 16355902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20955361 - 2¹¹ = 20953313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20955367) 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 7 ways as a sum of consecutive naturals, for example, 6405 + ... + 9106.

It is an arithmetic number, because the mean of its divisors is an integer number (3009328).

Almost surely, 2^20955361 is an apocalyptic number.

It is an amenable number.

20955361 is a deficient number, since it is larger than the sum of its proper divisors (3119263).

20955361 is a wasteful number, since it uses less digits than its factorization.

20955361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15711.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 20955361 is about 4577.7025897277. The cubic root of 20955361 is about 275.6967938570.

It can be divided in two parts, 20955 and 361, that added together give a square (21316 = 146²).

The spelling of 20955361 in words is "twenty million, nine hundred fifty-five thousand, three hundred sixty-one".