21513270567 has 8 divisors (see below), whose sum is σ = 29294666496. Its totient is φ = 14037027512.

The previous prime is 21513270553. The next prime is 21513270589. The reversal of 21513270567 is 76507231512.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21513270567 - 2¹⁰ = 21513269543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21513270067) 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, 76288053 + ... + 76288334.

It is an arithmetic number, because the mean of its divisors is an integer number (3661833312).

Almost surely, 2^21513270567 is an apocalyptic number.

21513270567 is a deficient number, since it is larger than the sum of its proper divisors (7781395929).

21513270567 is a wasteful number, since it uses less digits than its factorization.

21513270567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152576437.

The product of its (nonzero) digits is 88200, while the sum is 39.

The spelling of 21513270567 in words is "twenty-one billion, five hundred thirteen million, two hundred seventy thousand, five hundred sixty-seven".