20912086 has 32 divisors (see below), whose sum is σ = 35038080. Its totient is φ = 9300096.

The previous prime is 20912071. The next prime is 20912113. The reversal of 20912086 is 68021902.

It is a happy number.

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, 133120 + ... + 133276.

It is an arithmetic number, because the mean of its divisors is an integer number (1094940).

Almost surely, 2^20912086 is an apocalyptic number.

20912086 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20912086 is a deficient number, since it is larger than the sum of its proper divisors (14125994).

20912086 is a wasteful number, since it uses less digits than its factorization.

20912086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 20912086 is about 4572.9734309309. The cubic root of 20912086 is about 275.5068822165.

Adding to 20912086 its reverse (68021902), we get a palindrome (88933988).

The spelling of 20912086 in words is "twenty million, nine hundred twelve thousand, eighty-six".