19700563 has 4 divisors (see below), whose sum is σ = 19709560. Its totient is φ = 19691568.

The previous prime is 19700557. The next prime is 19700617. The reversal of 19700563 is 36500791.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19700563 is a prime.

It is a super-2 number, since 2×19700563² = 776224365033938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19700543) 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 3 ways as a sum of consecutive naturals, for example, 1156 + ... + 6382.

It is an arithmetic number, because the mean of its divisors is an integer number (4927390).

Almost surely, 2^19700563 is an apocalyptic number.

19700563 is a deficient number, since it is larger than the sum of its proper divisors (8997).

19700563 is an equidigital number, since it uses as much as digits as its factorization.

19700563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8996.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 19700563 is about 4438.5316265630. The cubic root of 19700563 is about 270.0802824820.

The spelling of 19700563 in words is "nineteen million, seven hundred thousand, five hundred sixty-three".