20766630 has 16 divisors (see below), whose sum is σ = 49839984. Its totient is φ = 5537760.

The previous prime is 20766593. The next prime is 20766649. The reversal of 20766630 is 3666702.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 692221 = 20766630 / (2 + 0 + 7 + 6 + 6 + 6 + 3 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346081 + ... + 346140.

It is an arithmetic number, because the mean of its divisors is an integer number (3114999).

Almost surely, 2^20766630 is an apocalyptic number.

20766630 is an abundant number, since it is smaller than the sum of its proper divisors (29073354).

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

20766630 is a wasteful number, since it uses less digits than its factorization.

20766630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692231.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 20766630 is about 4557.0418036266. The cubic root of 20766630 is about 274.8666240279.

The spelling of 20766630 in words is "twenty million, seven hundred sixty-six thousand, six hundred thirty".