20149795 has 4 divisors (see below), whose sum is σ = 24179760. Its totient is φ = 16119832.

The previous prime is 20149741. The next prime is 20149799. The reversal of 20149795 is 59794102.

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 20149795 - 2²³ = 11761187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20149799) 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, 2014975 + ... + 2014984.

It is an arithmetic number, because the mean of its divisors is an integer number (6044940).

Almost surely, 2^20149795 is an apocalyptic number.

20149795 is a deficient number, since it is larger than the sum of its proper divisors (4029965).

20149795 is an equidigital number, since it uses as much as digits as its factorization.

20149795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4029964.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 20149795 is about 4488.8523032062. The cubic root of 20149795 is about 272.1177537655.

The spelling of 20149795 in words is "twenty million, one hundred forty-nine thousand, seven hundred ninety-five".