21274628471 has 2 divisors, whose sum is σ = 21274628472. Its totient is φ = 21274628470.

The previous prime is 21274628437. The next prime is 21274628503. The reversal of 21274628471 is 17482647212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21274628471 - 2⁶ = 21274628407 is a prime.

It is a super-3 number, since 3×21274628471³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21274628411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10637314235 + 10637314236.

It is an arithmetic number, because the mean of its divisors is an integer number (10637314236).

Almost surely, 2^21274628471 is an apocalyptic number.

21274628471 is a deficient number, since it is larger than the sum of its proper divisors (1).

21274628471 is an equidigital number, since it uses as much as digits as its factorization.

21274628471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 301056, while the sum is 44.

The spelling of 21274628471 in words is "twenty-one billion, two hundred seventy-four million, six hundred twenty-eight thousand, four hundred seventy-one".