21342308531 has 8 divisors (see below), whose sum is σ = 21568560144. Its totient is φ = 21116712960.

The previous prime is 21342308483. The next prime is 21342308539. The reversal of 21342308531 is 13580324312.

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 21342308531 - 2²⁶ = 21275199667 is a prime.

It is a super-2 number, since 2×21342308531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21342308539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98465 + ... + 228866.

It is an arithmetic number, because the mean of its divisors is an integer number (2696070018).

Almost surely, 2^21342308531 is an apocalyptic number.

21342308531 is a deficient number, since it is larger than the sum of its proper divisors (226251613).

21342308531 is a wasteful number, since it uses less digits than its factorization.

21342308531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328021.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 21342308531 in words is "twenty-one billion, three hundred forty-two million, three hundred eight thousand, five hundred thirty-one".