21663536120602 has 8 divisors (see below), whose sum is σ = 32497794472500. Its totient is φ = 10830937963104.

The previous prime is 21663536120587. The next prime is 21663536120623. The reversal of 21663536120602 is 20602163536612.

It can be written as a sum of positive squares in 2 ways, for example, as 21663430051201 + 106069401 = 4654399^2 + 10299^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415015977 + ... + 415068172.

Almost surely, 2^{21663536120602} is an apocalyptic number.

21663536120602 is a deficient number, since it is larger than the sum of its proper divisors (10834258351898).

21663536120602 is a wasteful number, since it uses less digits than its factorization.

21663536120602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830097200.

The product of its (nonzero) digits is 466560, while the sum is 43.

The spelling of 21663536120602 in words is "twenty-one trillion, six hundred sixty-three billion, five hundred thirty-six million, one hundred twenty thousand, six hundred two".