21375132717606 has 8 divisors (see below), whose sum is σ = 42750265435224. Its totient is φ = 7125044239200.

The previous prime is 21375132717599. The next prime is 21375132717613. The reversal of 21375132717606 is 60671723157312.

It is an interprime number because it is at equal distance from previous prime (21375132717599) and next prime (21375132717613).

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

21375132717606 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1781261059795 + ... + 1781261059806.

It is an arithmetic number, because the mean of its divisors is an integer number (5343783179403).

Almost surely, 2^{21375132717606} is an apocalyptic number.

21375132717606 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21375132717606 is a wasteful number, since it uses less digits than its factorization.

21375132717606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3562522119606.

The product of its (nonzero) digits is 2222640, while the sum is 51.

The spelling of 21375132717606 in words is "twenty-one trillion, three hundred seventy-five billion, one hundred thirty-two million, seven hundred seventeen thousand, six hundred six".