21338287002 has 20 divisors (see below), whose sum is σ = 47813569386. Its totient is φ = 7112762280.

The previous prime is 21338286989. The next prime is 21338287013. The reversal of 21338287002 is 20078283312.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18815334561 + 2522952441 = 137169^2 + 50229^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 65858749 + ... + 65859072.

Almost surely, 2^21338287002 is an apocalyptic number.

21338287002 is an abundant number, since it is smaller than the sum of its proper divisors (26475282384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21338287002 is a wasteful number, since it uses less digits than its factorization.

21338287002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131717835 (or 131717826 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 21338287002 in words is "twenty-one billion, three hundred thirty-eight million, two hundred eighty-seven thousand, two".