20669010 has 32 divisors (see below), whose sum is σ = 50094720. Its totient is φ = 5457408.

The previous prime is 20669009. The next prime is 20669027. The reversal of 20669010 is 1096602.

It is a zygodrome in base 8.

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, 255 + ... + 6434.

It is an arithmetic number, because the mean of its divisors is an integer number (1565460).

Almost surely, 2^20669010 is an apocalyptic number.

20669010 is an abundant number, since it is smaller than the sum of its proper divisors (29425710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20669010 is a wasteful number, since it uses less digits than its factorization.

20669010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6802.

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

The square root of 20669010 is about 4546.3182906611. The cubic root of 20669010 is about 274.4352487110.

The spelling of 20669010 in words is "twenty million, six hundred sixty-nine thousand, ten".