21626201660432 has 10 divisors (see below), whose sum is σ = 41900765717118. Its totient is φ = 10813100830208.

The previous prime is 21626201660383. The next prime is 21626201660587. The reversal of 21626201660432 is 23406610262612.

It can be written as a sum of positive squares in only one way, i.e., 14935164076816 + 6691037583616 = 3864604^2 + 2586704^2 .

It is a super-3 number, since 3×21626201660432³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21626201660432.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 675818801873 + ... + 675818801904.

Almost surely, 2^{21626201660432} is an apocalyptic number.

It is an amenable number.

21626201660432 is a deficient number, since it is larger than the sum of its proper divisors (20274564056686).

21626201660432 is a wasteful number, since it uses less digits than its factorization.

21626201660432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351637603785 (or 1351637603779 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 21626201660432 in words is "twenty-one trillion, six hundred twenty-six billion, two hundred one million, six hundred sixty thousand, four hundred thirty-two".