21172580710 has 16 divisors (see below), whose sum is σ = 39424806000. Its totient is φ = 8176996576.

The previous prime is 21172580699. The next prime is 21172580711. The reversal of 21172580710 is 1708527112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21172580711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36504160 + ... + 36504739.

It is an arithmetic number, because the mean of its divisors is an integer number (2464050375).

Almost surely, 2^21172580710 is an apocalyptic number.

21172580710 is a deficient number, since it is larger than the sum of its proper divisors (18252225290).

21172580710 is a wasteful number, since it uses less digits than its factorization.

21172580710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73008935.

The product of its (nonzero) digits is 7840, while the sum is 34.

The spelling of 21172580710 in words is "twenty-one billion, one hundred seventy-two million, five hundred eighty thousand, seven hundred ten".