21138276776483 has 16 divisors (see below), whose sum is σ = 22296667975680. Its totient is φ = 20000053598976.

The previous prime is 21138276776479. The next prime is 21138276776521. The reversal of 21138276776483 is 38467767283112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21138276776483 - 2² = 21138276776479 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21138276676483) 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, 1627838 + ... + 6702716.

It is an arithmetic number, because the mean of its divisors is an integer number (1393541748480).

Almost surely, 2^{21138276776483} is an apocalyptic number.

21138276776483 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21138276776483 is a deficient number, since it is larger than the sum of its proper divisors (1158391199197).

21138276776483 is a wasteful number, since it uses less digits than its factorization.

21138276776483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5076866.

The product of its digits is 113799168, while the sum is 65.

The spelling of 21138276776483 in words is "twenty-one trillion, one hundred thirty-eight billion, two hundred seventy-six million, seven hundred seventy-six thousand, four hundred eighty-three".