20669077 has 8 divisors (see below), whose sum is σ = 24282720. Its totient is φ = 17344560.

The previous prime is 20669069. The next prime is 20669081. The reversal of 20669077 is 77096602.

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

It is a cyclic number.

It is not a de Polignac number, because 20669077 - 2³ = 20669069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20669027) 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 7 ways as a sum of consecutive naturals, for example, 72127 + ... + 72412.

It is an arithmetic number, because the mean of its divisors is an integer number (3035340).

Almost surely, 2^20669077 is an apocalyptic number.

It is an amenable number.

20669077 is a deficient number, since it is larger than the sum of its proper divisors (3613643).

20669077 is a wasteful number, since it uses less digits than its factorization.

20669077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144563.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 20669077 is about 4546.3256592550. The cubic root of 20669077 is about 274.4355452442.

The spelling of 20669077 in words is "twenty million, six hundred sixty-nine thousand, seventy-seven".