20963474 has 16 divisors (see below), whose sum is σ = 36672000. Its totient is φ = 8984052.

The previous prime is 20963473. The next prime is 20963507. The reversal of 20963474 is 47436902.

It is not an unprimeable number, because it can be changed into a prime (20963473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14594 + ... + 15965.

It is an arithmetic number, because the mean of its divisors is an integer number (2292000).

Almost surely, 2^20963474 is an apocalyptic number.

20963474 is a deficient number, since it is larger than the sum of its proper divisors (15708526).

20963474 is an equidigital number, since it uses as much as digits as its factorization.

20963474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30582 (or 30568 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 20963474 is about 4578.5886471707. The cubic root of 20963474 is about 275.7323685165.

The spelling of 20963474 in words is "twenty million, nine hundred sixty-three thousand, four hundred seventy-four".