21369004744 has 32 divisors (see below), whose sum is σ = 40279406400. Its totient is φ = 10627888320.

The previous prime is 21369004681. The next prime is 21369004747. The reversal of 21369004744 is 44740096312.

It is a junction number, because it is equal to n+sod(n) for n = 21369004697 and 21369004706.

It is not an unprimeable number, because it can be changed into a prime (21369004747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6002437 + ... + 6005995.

It is an arithmetic number, because the mean of its divisors is an integer number (1258731450).

Almost surely, 2^21369004744 is an apocalyptic number.

It is an amenable number.

21369004744 is a deficient number, since it is larger than the sum of its proper divisors (18910401656).

21369004744 is a wasteful number, since it uses less digits than its factorization.

21369004744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7333 (or 7329 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 21369004744 in words is "twenty-one billion, three hundred sixty-nine million, four thousand, seven hundred forty-four".