21700087240628 has 12 divisors (see below), whose sum is σ = 38027969300160. Its totient is φ = 10834953154872.

The previous prime is 21700087240627. The next prime is 21700087240661. The reversal of 21700087240628 is 82604278000712.

It is a happy number.

It is a super-2 number, since 2×21700087240628² (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 (21700087240627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3772613126 + ... + 3772618877.

It is an arithmetic number, because the mean of its divisors is an integer number (3168997441680).

Almost surely, 2^{21700087240628} is an apocalyptic number.

It is an amenable number.

21700087240628 is a deficient number, since it is larger than the sum of its proper divisors (16327882059532).

21700087240628 is a wasteful number, since it uses less digits than its factorization.

21700087240628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7545232726 (or 7545232724 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 47.

The spelling of 21700087240628 in words is "twenty-one trillion, seven hundred billion, eighty-seven million, two hundred forty thousand, six hundred twenty-eight".