21032086172 has 24 divisors (see below), whose sum is σ = 37008099072. Its totient is φ = 10458470000.

The previous prime is 21032086139. The next prime is 21032086211. The reversal of 21032086172 is 27168023012.

It is a super-2 number, since 2×21032086172² (a number of 21 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 670397 + ... + 701067.

It is an arithmetic number, because the mean of its divisors is an integer number (1542004128).

Almost surely, 2^21032086172 is an apocalyptic number.

It is an amenable number.

21032086172 is a deficient number, since it is larger than the sum of its proper divisors (15976012900).

21032086172 is a wasteful number, since it uses less digits than its factorization.

21032086172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31609 (or 31607 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 21032086172 in words is "twenty-one billion, thirty-two million, eighty-six thousand, one hundred seventy-two".