21002033334 has 16 divisors (see below), whose sum is σ = 43452483120. Its totient is φ = 6759275040.

The previous prime is 21002033329. The next prime is 21002033389. The reversal of 21002033334 is 43333020012.

It is a self number, because there is not a number n which added to its sum of digits gives 21002033334.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60350497 + ... + 60350844.

It is an arithmetic number, because the mean of its divisors is an integer number (2715780195).

Almost surely, 2^21002033334 is an apocalyptic number.

21002033334 is an abundant number, since it is smaller than the sum of its proper divisors (22450449786).

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

21002033334 is a wasteful number, since it uses less digits than its factorization.

21002033334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120701375.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 21002033334 its reverse (43333020012), we get a palindrome (64335053346).

The spelling of 21002033334 in words is "twenty-one billion, two million, thirty-three thousand, three hundred thirty-four".