21030344004 has 48 divisors (see below), whose sum is σ = 50799672000. Its totient is φ = 6763483776.

The previous prime is 21030343973. The next prime is 21030344011. The reversal of 21030344004 is 40044303012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475422 + ... + 517770.

It is an arithmetic number, because the mean of its divisors is an integer number (1058326500).

Almost surely, 2^21030344004 is an apocalyptic number.

It is an amenable number.

21030344004 is an abundant number, since it is smaller than the sum of its proper divisors (29769327996).

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

21030344004 is a wasteful number, since it uses less digits than its factorization.

21030344004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43812 (or 43810 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21030344004 its reverse (40044303012), we get a palindrome (61074647016).

The spelling of 21030344004 in words is "twenty-one billion, thirty million, three hundred forty-four thousand, four".