20365955 has 4 divisors (see below), whose sum is σ = 24439152. Its totient is φ = 16292760.

The previous prime is 20365901. The next prime is 20365957. The reversal of 20365955 is 55956302.

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

It is not a de Polignac number, because 20365955 - 2¹⁶ = 20300419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20365957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2036591 + ... + 2036600.

It is an arithmetic number, because the mean of its divisors is an integer number (6109788).

Almost surely, 2^20365955 is an apocalyptic number.

20365955 is a deficient number, since it is larger than the sum of its proper divisors (4073197).

20365955 is an equidigital number, since it uses as much as digits as its factorization.

20365955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4073196.

The product of its (nonzero) digits is 40500, while the sum is 35.

The square root of 20365955 is about 4512.8654976633. The cubic root of 20365955 is about 273.0873563733.

The spelling of 20365955 in words is "twenty million, three hundred sixty-five thousand, nine hundred fifty-five".