21342506271 has 8 divisors (see below), whose sum is σ = 28460735664. Its totient is φ = 14226307200.

The previous prime is 21342506203. The next prime is 21342506321. The reversal of 21342506271 is 17260524312.

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

It is not a de Polignac number, because 21342506271 - 2²³ = 21334117663 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342506201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 482880 + ... + 525221.

It is an arithmetic number, because the mean of its divisors is an integer number (3557591958).

Almost surely, 2^21342506271 is an apocalyptic number.

21342506271 is a deficient number, since it is larger than the sum of its proper divisors (7118229393).

21342506271 is a wasteful number, since it uses less digits than its factorization.

21342506271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015161.

The product of its (nonzero) digits is 20160, while the sum is 33.

The spelling of 21342506271 in words is "twenty-one billion, three hundred forty-two million, five hundred six thousand, two hundred seventy-one".