21276438471 has 6 divisors (see below), whose sum is σ = 30732633360. Its totient is φ = 14184292308.

The previous prime is 21276438467. The next prime is 21276438473. The reversal of 21276438471 is 17483467212.

It is not a de Polignac number, because 21276438471 - 2² = 21276438467 is a prime.

It is a super-3 number, since 3×21276438471³ (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 (21276438473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1182024351 + ... + 1182024368.

It is an arithmetic number, because the mean of its divisors is an integer number (5122105560).

Almost surely, 2^21276438471 is an apocalyptic number.

21276438471 is a deficient number, since it is larger than the sum of its proper divisors (9456194889).

21276438471 is a wasteful number, since it uses less digits than its factorization.

21276438471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2364048725 (or 2364048722 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The spelling of 21276438471 in words is "twenty-one billion, two hundred seventy-six million, four hundred thirty-eight thousand, four hundred seventy-one".