21024302104 has 48 divisors (see below), whose sum is σ = 44804959920. Its totient is φ = 9192795840.

The previous prime is 21024302069. The next prime is 21024302179. The reversal of 21024302104 is 40120342012.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 242452 + ... + 317539.

It is an arithmetic number, because the mean of its divisors is an integer number (933436665).

Almost surely, 2^21024302104 is an apocalyptic number.

It is an amenable number.

21024302104 is an abundant number, since it is smaller than the sum of its proper divisors (23780657816).

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

21024302104 is a wasteful number, since it uses less digits than its factorization.

21024302104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560048 (or 560025 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21024302104 its reverse (40120342012), we get a palindrome (61144644116).

The spelling of 21024302104 in words is "twenty-one billion, twenty-four million, three hundred two thousand, one hundred four".