21299063795 has 16 divisors (see below), whose sum is σ = 26393236320. Its totient is φ = 16490283264.

The previous prime is 21299063791. The next prime is 21299063843. The reversal of 21299063795 is 59736099212.

It is a cyclic number.

It is not a de Polignac number, because 21299063795 - 2² = 21299063791 is a prime.

It is a super-3 number, since 3×21299063795³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21299063791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430994 + ... + 477863.

It is an arithmetic number, because the mean of its divisors is an integer number (1649577270).

Almost surely, 2^21299063795 is an apocalyptic number.

21299063795 is a deficient number, since it is larger than the sum of its proper divisors (5094172525).

21299063795 is a wasteful number, since it uses less digits than its factorization.

21299063795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909014.

The product of its (nonzero) digits is 1837080, while the sum is 53.

The spelling of 21299063795 in words is "twenty-one billion, two hundred ninety-nine million, sixty-three thousand, seven hundred ninety-five".