20647070 has 16 divisors (see below), whose sum is σ = 37404288. Its totient is φ = 8205600.

The previous prime is 20647049. The next prime is 20647093. The reversal of 20647070 is 7074602.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 5006 + ... + 8145.

It is an arithmetic number, because the mean of its divisors is an integer number (2337768).

Almost surely, 2^20647070 is an apocalyptic number.

20647070 is a deficient number, since it is larger than the sum of its proper divisors (16757218).

20647070 is a wasteful number, since it uses less digits than its factorization.

20647070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13315.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 20647070 is about 4543.9047085079. The cubic root of 20647070 is about 274.3381106757.

The spelling of 20647070 in words is "twenty million, six hundred forty-seven thousand, seventy".