21276097443 has 16 divisors (see below), whose sum is σ = 31622828160. Its totient is φ = 14137857288.

The previous prime is 21276097441. The next prime is 21276097477. The reversal of 21276097443 is 34479067212.

It is not a de Polignac number, because 21276097443 - 2¹ = 21276097441 is a prime.

It is a super-2 number, since 2×21276097443² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21276097441) 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, 1275105 + ... + 1291682.

It is an arithmetic number, because the mean of its divisors is an integer number (1976426760).

Almost surely, 2^21276097443 is an apocalyptic number.

21276097443 is a deficient number, since it is larger than the sum of its proper divisors (10346730717).

21276097443 is a wasteful number, since it uses less digits than its factorization.

21276097443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2567103 (or 2567097 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 21276097443 in words is "twenty-one billion, two hundred seventy-six million, ninety-seven thousand, four hundred forty-three".