21170422821734 has 8 divisors (see below), whose sum is σ = 32431286024928. Its totient is φ = 10359994146760.

The previous prime is 21170422821731. The next prime is 21170422821797. The reversal of 21170422821734 is 43712822407112.

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

It is a super-3 number, since 3×21170422821734³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21170422821731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112608631937 + ... + 112608632124.

It is an arithmetic number, because the mean of its divisors is an integer number (4053910753116).

Almost surely, 2^{21170422821734} is an apocalyptic number.

21170422821734 is a deficient number, since it is larger than the sum of its proper divisors (11260863203194).

21170422821734 is a wasteful number, since it uses less digits than its factorization.

21170422821734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225217264110.

The product of its (nonzero) digits is 301056, while the sum is 44.

The spelling of 21170422821734 in words is "twenty-one trillion, one hundred seventy billion, four hundred twenty-two million, eight hundred twenty-one thousand, seven hundred thirty-four".