21470552260172 has 12 divisors (see below), whose sum is σ = 37672604891880. Its totient is φ = 10706950862496.

The previous prime is 21470552260151. The next prime is 21470552260181. The reversal of 21470552260172 is 27106225507412.

It is a super-2 number, since 2×21470552260172² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7081315193 + ... + 7081318224.

It is an arithmetic number, because the mean of its divisors is an integer number (3139383740990).

Almost surely, 2^{21470552260172} is an apocalyptic number.

It is an amenable number.

21470552260172 is a deficient number, since it is larger than the sum of its proper divisors (16202052631708).

21470552260172 is a wasteful number, since it uses less digits than its factorization.

21470552260172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14162633800 (or 14162633798 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 44.

Adding to 21470552260172 its reverse (27106225507412), we get a palindrome (48576777767584).

The spelling of 21470552260172 in words is "twenty-one trillion, four hundred seventy billion, five hundred fifty-two million, two hundred sixty thousand, one hundred seventy-two".