20942795 has 4 divisors (see below), whose sum is σ = 25131360. Its totient is φ = 16754232.

The previous prime is 20942783. The next prime is 20942797. The reversal of 20942795 is 59724902.

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 20942795 - 2¹⁸ = 20680651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20942797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2094275 + ... + 2094284.

It is an arithmetic number, because the mean of its divisors is an integer number (6282840).

Almost surely, 2^20942795 is an apocalyptic number.

20942795 is a deficient number, since it is larger than the sum of its proper divisors (4188565).

20942795 is an equidigital number, since it uses as much as digits as its factorization.

20942795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4188564.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 20942795 is about 4576.3298613627. The cubic root of 20942795 is about 275.6416751275.

The spelling of 20942795 in words is "twenty million, nine hundred forty-two thousand, seven hundred ninety-five".