20963516 has 24 divisors (see below), whose sum is σ = 44394336. Its totient is φ = 8455680.

The previous prime is 20963507. The next prime is 20963521. The reversal of 20963516 is 61536902.

It is a happy number.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

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, 21545 + ... + 22496.

It is an arithmetic number, because the mean of its divisors is an integer number (1849764).

Almost surely, 2^20963516 is an apocalyptic number.

It is an amenable number.

20963516 is an abundant number, since it is smaller than the sum of its proper divisors (23430820).

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

20963516 is a wasteful number, since it uses less digits than its factorization.

20963516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44069 (or 44067 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 20963516 is about 4578.5932337346. The cubic root of 20963516 is about 275.7325526582.

The spelling of 20963516 in words is "twenty million, nine hundred sixty-three thousand, five hundred sixteen".