20345086 has 32 divisors (see below), whose sum is σ = 33390720. Its totient is φ = 9266400.

The previous prime is 20345077. The next prime is 20345093. The reversal of 20345086 is 68054302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155241 + ... + 155371.

It is an arithmetic number, because the mean of its divisors is an integer number (1043460).

Almost surely, 2^20345086 is an apocalyptic number.

20345086 is a deficient number, since it is larger than the sum of its proper divisors (13045634).

20345086 is a wasteful number, since it uses less digits than its factorization.

20345086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20345086 is about 4510.5527377473. The cubic root of 20345086 is about 272.9940469302.

Adding to 20345086 its reverse (68054302), we get a palindrome (88399388).

The spelling of 20345086 in words is "twenty million, three hundred forty-five thousand, eighty-six".