20280086 has 8 divisors (see below), whose sum is σ = 30449064. Its totient is φ = 10130400.

The previous prime is 20280067. The next prime is 20280101. The reversal of 20280086 is 68008202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20280086² = 822563776334792, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 1820 + ... + 6623.

It is an arithmetic number, because the mean of its divisors is an integer number (3806133).

Almost surely, 2^20280086 is an apocalyptic number.

20280086 is a deficient number, since it is larger than the sum of its proper divisors (10168978).

20280086 is a wasteful number, since it uses less digits than its factorization.

20280086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9646.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 20280086 is about 4503.3416481542. The cubic root of 20280086 is about 272.7030095115.

Adding to 20280086 its reverse (68008202), we get a palindrome (88288288).

The spelling of 20280086 in words is "twenty million, two hundred eighty thousand, eighty-six".