21086369763 has 4 divisors (see below), whose sum is σ = 28115159688. Its totient is φ = 14057579840.

The previous prime is 21086369737. The next prime is 21086369789. The reversal of 21086369763 is 36796368012.

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

It is an interprime number because it is at equal distance from previous prime (21086369737) and next prime (21086369789).

It is a cyclic number.

It is not a de Polignac number, because 21086369763 - 2²¹ = 21084272611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21086369063) 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, 3514394958 + ... + 3514394963.

It is an arithmetic number, because the mean of its divisors is an integer number (7028789922).

Almost surely, 2^21086369763 is an apocalyptic number.

21086369763 is a deficient number, since it is larger than the sum of its proper divisors (7028789925).

21086369763 is an equidigital number, since it uses as much as digits as its factorization.

21086369763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7028789924.

The product of its (nonzero) digits is 1959552, while the sum is 51.

The spelling of 21086369763 in words is "twenty-one billion, eighty-six million, three hundred sixty-nine thousand, seven hundred sixty-three".