21210230004 has 24 divisors (see below), whose sum is σ = 49497805728. Its totient is φ = 7069038240.

The previous prime is 21210229993. The next prime is 21210230011. The reversal of 21210230004 is 40003201212.

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, 42342 + ... + 210269.

It is an arithmetic number, because the mean of its divisors is an integer number (2062408572).

Almost surely, 2^21210230004 is an apocalyptic number.

It is an amenable number.

21210230004 is an abundant number, since it is smaller than the sum of its proper divisors (28287575724).

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

21210230004 is a wasteful number, since it uses less digits than its factorization.

21210230004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259615 (or 259613 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21210230004 its reverse (40003201212), we get a palindrome (61213431216).

The spelling of 21210230004 in words is "twenty-one billion, two hundred ten million, two hundred thirty thousand, four".