21234202002 has 320 divisors, whose sum is σ = 57379601664. Its totient is φ = 5802762240.

The previous prime is 21234201959. The next prime is 21234202043. The reversal of 21234202002 is 20020243212.

21234202002 is a `hidden beast` number, since 21 + 23 + 420 + 200 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 88108602 + ... + 88108842.

Almost surely, 2^21234202002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21234202002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28689800832).

21234202002 is an abundant number, since it is smaller than the sum of its proper divisors (36145399662).

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

21234202002 is a wasteful number, since it uses less digits than its factorization.

21234202002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 21234202002 its reverse (20020243212), we get a palindrome (41254445214).

The spelling of 21234202002 in words is "twenty-one billion, two hundred thirty-four million, two hundred two thousand, two".