21300606763 has 4 divisors (see below), whose sum is σ = 21302564920. Its totient is φ = 21298648608.

The previous prime is 21300606703. The next prime is 21300606791. The reversal of 21300606763 is 36760600312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21300606763 is a prime.

It is a super-2 number, since 2×21300606763² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21300606703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 962670 + ... + 984547.

It is an arithmetic number, because the mean of its divisors is an integer number (5325641230).

Almost surely, 2^21300606763 is an apocalyptic number.

21300606763 is a deficient number, since it is larger than the sum of its proper divisors (1958157).

21300606763 is a wasteful number, since it uses less digits than its factorization.

21300606763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958156.

The product of its (nonzero) digits is 27216, while the sum is 34.

The spelling of 21300606763 in words is "twenty-one billion, three hundred million, six hundred six thousand, seven hundred sixty-three".