20010669 has 24 divisors (see below), whose sum is σ = 31239648. Its totient is φ = 11360160.

The previous prime is 20010637. The next prime is 20010691. The reversal of 20010669 is 96601002.

It is not a de Polignac number, because 20010669 - 2⁵ = 20010637 is a prime.

It is a super-2 number, since 2×20010669² = 800853747655122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010269) 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 23 ways as a sum of consecutive naturals, for example, 28614 + ... + 29304.

It is an arithmetic number, because the mean of its divisors is an integer number (1301652).

Almost surely, 2^20010669 is an apocalyptic number.

It is an amenable number.

20010669 is a deficient number, since it is larger than the sum of its proper divisors (11228979).

20010669 is a wasteful number, since it uses less digits than its factorization.

20010669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 20010669 is about 4473.3286264257. The cubic root of 20010669 is about 271.4900199486.

The spelling of 20010669 in words is "twenty million, ten thousand, six hundred sixty-nine".