20942085 has 32 divisors (see below), whose sum is σ = 35544960. Its totient is φ = 10499328.

The previous prime is 20942083. The next prime is 20942101. The reversal of 20942085 is 58024902.

It is not a de Polignac number, because 20942085 - 2¹ = 20942083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20942083) 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 31 ways as a sum of consecutive naturals, for example, 55959 + ... + 56331.

It is an arithmetic number, because the mean of its divisors is an integer number (1110780).

Almost surely, 2^20942085 is an apocalyptic number.

It is an amenable number.

20942085 is a deficient number, since it is larger than the sum of its proper divisors (14602875).

20942085 is a wasteful number, since it uses less digits than its factorization.

20942085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 20942085 is about 4576.2522876258. The cubic root of 20942085 is about 275.6385601691.

Adding to 20942085 its reverse (58024902), we get a palindrome (78966987).

The spelling of 20942085 in words is "twenty million, nine hundred forty-two thousand, eighty-five".