20963630 has 24 divisors (see below), whose sum is σ = 38388168. Its totient is φ = 8242608.

The previous prime is 20963597. The next prime is 20963633. The reversal of 20963630 is 3636902.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20963593 and 20963602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20963633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44657 + ... + 45123.

It is an arithmetic number, because the mean of its divisors is an integer number (1599507).

Almost surely, 2^20963630 is an apocalyptic number.

20963630 is a deficient number, since it is larger than the sum of its proper divisors (17424538).

20963630 is an equidigital number, since it uses as much as digits as its factorization.

20963630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 20963630 is about 4578.6056829563. The cubic root of 20963630 is about 275.7330524703.

The spelling of 20963630 in words is "twenty million, nine hundred sixty-three thousand, six hundred thirty".