20963670 has 96 divisors (see below), whose sum is σ = 63086688. Its totient is φ = 4419072.

The previous prime is 20963659. The next prime is 20963671. The reversal of 20963670 is 7636902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20963671) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18562 + ... + 19658.

It is an arithmetic number, because the mean of its divisors is an integer number (657153).

Almost surely, 2^20963670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20963670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31543344).

20963670 is an abundant number, since it is smaller than the sum of its proper divisors (42123018).

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

20963670 is a wasteful number, since it uses less digits than its factorization.

20963670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134 (or 1127 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 20963670 is about 4578.6100510963. The cubic root of 20963670 is about 275.7332278425.

The spelling of 20963670 in words is "twenty million, nine hundred sixty-three thousand, six hundred seventy".