20086669 has 4 divisors (see below), whose sum is σ = 20103520. Its totient is φ = 20069820.

The previous prime is 20086657. The next prime is 20086699. The reversal of 20086669 is 96668002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20086669 - 2⁵ = 20086637 is a prime.

It is a super-2 number, since 2×20086669² = 806948543031122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20086699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6489 + ... + 9070.

It is an arithmetic number, because the mean of its divisors is an integer number (5025880).

Almost surely, 2^20086669 is an apocalyptic number.

It is an amenable number.

20086669 is a deficient number, since it is larger than the sum of its proper divisors (16851).

20086669 is a wasteful number, since it uses less digits than its factorization.

20086669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16850.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 20086669 is about 4481.8153687987. The cubic root of 20086669 is about 271.8332897478.

The spelling of 20086669 in words is "twenty million, eighty-six thousand, six hundred sixty-nine".