21507532014722 has 16 divisors (see below), whose sum is σ = 34743349257792. Its totient is φ = 9926435258640.

The previous prime is 21507532014713. The next prime is 21507532014763. The reversal of 21507532014722 is 22741023570512.

It is a self number, because there is not a number n which added to its sum of digits gives 21507532014722.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2666708 + ... + 7079999.

It is an arithmetic number, because the mean of its divisors is an integer number (2171459328612).

Almost surely, 2^{21507532014722} is an apocalyptic number.

21507532014722 is a deficient number, since it is larger than the sum of its proper divisors (13235817243070).

21507532014722 is a wasteful number, since it uses less digits than its factorization.

21507532014722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9831593.

The product of its (nonzero) digits is 235200, while the sum is 41.

The spelling of 21507532014722 in words is "twenty-one trillion, five hundred seven billion, five hundred thirty-two million, fourteen thousand, seven hundred twenty-two".