21364527471 has 8 divisors (see below), whose sum is σ = 32555470464. Its totient is φ = 12208301400.

The previous prime is 21364527469. The next prime is 21364527473. The reversal of 21364527471 is 17472546312.

It is an interprime number because it is at equal distance from previous prime (21364527469) and next prime (21364527473).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21364527471 - 2¹ = 21364527469 is a prime.

It is a super-3 number, since 3×21364527471³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21364527473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508679205 + ... + 508679246.

It is an arithmetic number, because the mean of its divisors is an integer number (4069433808).

Almost surely, 2^21364527471 is an apocalyptic number.

21364527471 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21364527471 is a deficient number, since it is larger than the sum of its proper divisors (11190942993).

21364527471 is a wasteful number, since it uses less digits than its factorization.

21364527471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017358461.

The product of its digits is 282240, while the sum is 42.

The spelling of 21364527471 in words is "twenty-one billion, three hundred sixty-four million, five hundred twenty-seven thousand, four hundred seventy-one".