20970763 has 8 divisors (see below), whose sum is σ = 23252976. Its totient is φ = 18751200.

The previous prime is 20970743. The next prime is 20970769. The reversal of 20970763 is 36707902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20970763 - 2¹⁷ = 20839691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20970769) 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 7 ways as a sum of consecutive naturals, for example, 14956 + ... + 16297.

It is an arithmetic number, because the mean of its divisors is an integer number (2906622).

Almost surely, 2^20970763 is an apocalyptic number.

20970763 is a deficient number, since it is larger than the sum of its proper divisors (2282213).

20970763 is a wasteful number, since it uses less digits than its factorization.

20970763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31325.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 20970763 is about 4579.3845656376. The cubic root of 20970763 is about 275.7643221952.

The spelling of 20970763 in words is "twenty million, nine hundred seventy thousand, seven hundred sixty-three".