20647034 has 12 divisors (see below), whose sum is σ = 32687514. Its totient is φ = 9779832.

The previous prime is 20647019. The next prime is 20647049. The reversal of 20647034 is 43074602.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20647019) and next prime (20647049).

It can be written as a sum of positive squares in only one way, i.e., 11055625 + 9591409 = 3325^2 + 3097^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20646994 and 20647012.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 13577 + ... + 15020.

Almost surely, 2^20647034 is an apocalyptic number.

20647034 is a deficient number, since it is larger than the sum of its proper divisors (12040480).

20647034 is a wasteful number, since it uses less digits than its factorization.

20647034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28637 (or 28618 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 20647034 is about 4543.9007471555. The cubic root of 20647034 is about 274.3379512313.

The spelling of 20647034 in words is "twenty million, six hundred forty-seven thousand, thirty-four".