21304473650 has 48 divisors (see below), whose sum is σ = 40056704064. Its totient is φ = 8429426880.

The previous prime is 21304473629. The next prime is 21304473709. The reversal of 21304473650 is 5637440312.

It is a self number, because there is not a number n which added to its sum of digits gives 21304473650.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5987672 + ... + 5991228.

It is an arithmetic number, because the mean of its divisors is an integer number (834514668).

Almost surely, 2^21304473650 is an apocalyptic number.

21304473650 is a deficient number, since it is larger than the sum of its proper divisors (18752230414).

21304473650 is a wasteful number, since it uses less digits than its factorization.

21304473650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4835 (or 4830 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 35.

The spelling of 21304473650 in words is "twenty-one billion, three hundred four million, four hundred seventy-three thousand, six hundred fifty".