21106170342 has 24 divisors (see below), whose sum is σ = 46021316016. Its totient is φ = 6990577776.

The previous prime is 21106170331. The next prime is 21106170377. The reversal of 21106170342 is 24307160112.

21106170342 is a `hidden beast` number, since 2 + 1 + 1 + 0 + 617 + 0 + 3 + 42 = 666.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3731458 + ... + 3737109.

It is an arithmetic number, because the mean of its divisors is an integer number (1917554834).

Almost surely, 2^21106170342 is an apocalyptic number.

21106170342 is an abundant number, since it is smaller than the sum of its proper divisors (24915145674).

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

21106170342 is a wasteful number, since it uses less digits than its factorization.

21106170342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7468732 (or 7468729 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The spelling of 21106170342 in words is "twenty-one billion, one hundred six million, one hundred seventy thousand, three hundred forty-two".