21276859967 has 4 divisors (see below), whose sum is σ = 23211119976. Its totient is φ = 19342599960.

The previous prime is 21276859943. The next prime is 21276859973. The reversal of 21276859967 is 76995867212.

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

It is a cyclic number.

It is not a de Polignac number, because 21276859967 - 2²⁶ = 21209751103 is a prime.

It is a super-3 number, since 3×21276859967³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21276859997) 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, 967129988 + ... + 967130009.

It is an arithmetic number, because the mean of its divisors is an integer number (5802779994).

Almost surely, 2^21276859967 is an apocalyptic number.

21276859967 is a deficient number, since it is larger than the sum of its proper divisors (1934260009).

21276859967 is a wasteful number, since it uses less digits than its factorization.

21276859967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1934260008.

The product of its digits is 22861440, while the sum is 62.

The spelling of 21276859967 in words is "twenty-one billion, two hundred seventy-six million, eight hundred fifty-nine thousand, nine hundred sixty-seven".