21885517052002 has 4 divisors (see below), whose sum is σ = 32828275578006. Its totient is φ = 10942758526000.

The previous prime is 21885517051969. The next prime is 21885517052011. The reversal of 21885517052002 is 20025071558812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17818200187921 + 4067316864081 = 4221161^2 + 2016759^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5471379262999 + ... + 5471379263002.

Almost surely, 2^{21885517052002} is an apocalyptic number.

21885517052002 is a deficient number, since it is larger than the sum of its proper divisors (10942758526004).

21885517052002 is a wasteful number, since it uses less digits than its factorization.

21885517052002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10942758526003.

The product of its (nonzero) digits is 448000, while the sum is 46.

The spelling of 21885517052002 in words is "twenty-one trillion, eight hundred eighty-five billion, five hundred seventeen million, fifty-two thousand, two".