20683970 has 16 divisors (see below), whose sum is σ = 39191040. Its totient is φ = 7838064.

The previous prime is 20683961. The next prime is 20683973. The reversal of 20683970 is 7938602.

It is a super-2 number, since 2×20683970² = 855653229921800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20683970.

It is not an unprimeable number, because it can be changed into a prime (20683973) 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, 54242 + ... + 54621.

It is an arithmetic number, because the mean of its divisors is an integer number (2449440).

Almost surely, 2^20683970 is an apocalyptic number.

20683970 is a deficient number, since it is larger than the sum of its proper divisors (18507070).

20683970 is a wasteful number, since it uses less digits than its factorization.

20683970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108889.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 20683970 is about 4547.9632804147. The cubic root of 20683970 is about 274.5014438054.

The spelling of 20683970 in words is "twenty million, six hundred eighty-three thousand, nine hundred seventy".