21399595954202 has 8 divisors (see below), whose sum is σ = 32265712035156. Its totient is φ = 10644358609152.

The previous prime is 21399595954159. The next prime is 21399595954301. The reversal of 21399595954202 is 20245959599312.

It can be written as a sum of positive squares in 2 ways, for example, as 20978149596481 + 421446357721 = 4580191^2 + 649189^2 .

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, 27719683493 + ... + 27719684264.

Almost surely, 2^{21399595954202} is an apocalyptic number.

21399595954202 is a deficient number, since it is larger than the sum of its proper divisors (10866116080954).

21399595954202 is a wasteful number, since it uses less digits than its factorization.

21399595954202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55439367952.

The product of its (nonzero) digits is 78732000, while the sum is 65.

The spelling of 21399595954202 in words is "twenty-one trillion, three hundred ninety-nine billion, five hundred ninety-five million, nine hundred fifty-four thousand, two hundred two".