21470552260173 has 24 divisors (see below), whose sum is σ = 31424768187072. Its totient is φ = 14124645960768.

The previous prime is 21470552260151. The next prime is 21470552260181. The reversal of 21470552260173 is 37106225507412.

21470552260173 is a `hidden beast` number, since 2 + 1 + 4 + 7 + 0 + 552 + 26 + 0 + 1 + 73 = 666.

It is not a de Polignac number, because 21470552260173 - 2⁸ = 21470552259917 is a prime.

It is a super-2 number, since 2×21470552260173² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21470532260173) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40658736 + ... + 41183417.

It is an arithmetic number, because the mean of its divisors is an integer number (1309365341128).

Almost surely, 2^{21470552260173} is an apocalyptic number.

It is an amenable number.

21470552260173 is a deficient number, since it is larger than the sum of its proper divisors (9954215926899).

21470552260173 is a wasteful number, since it uses less digits than its factorization.

21470552260173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81842545 (or 81842542 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

Adding to 21470552260173 its reverse (37106225507412), we get a palindrome (58576777767585).

The spelling of 21470552260173 in words is "twenty-one trillion, four hundred seventy billion, five hundred fifty-two million, two hundred sixty thousand, one hundred seventy-three".