20970616 has 16 divisors (see below), whose sum is σ = 40062600. Its totient is φ = 10287264.

The previous prime is 20970589. The next prime is 20970617. The reversal of 20970616 is 61607902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20970617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24306 + ... + 25153.

Almost surely, 2^20970616 is an apocalyptic number.

It is an amenable number.

20970616 is a deficient number, since it is larger than the sum of its proper divisors (19091984).

20970616 is a wasteful number, since it uses less digits than its factorization.

20970616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49518 (or 49514 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 20970616 is about 4579.3685154178. The cubic root of 20970616 is about 275.7636778466.

The spelling of 20970616 in words is "twenty million, nine hundred seventy thousand, six hundred sixteen".