21369004723 has 32 divisors (see below), whose sum is σ = 24478433280. Its totient is φ = 18476964000.

The previous prime is 21369004681. The next prime is 21369004747. The reversal of 21369004723 is 32740096312.

It is not a de Polignac number, because 21369004723 - 2⁹ = 21369004211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21369004793) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14141538 + ... + 14143048.

It is an arithmetic number, because the mean of its divisors is an integer number (764951040).

Almost surely, 2^21369004723 is an apocalyptic number.

21369004723 is a deficient number, since it is larger than the sum of its proper divisors (3109428557).

21369004723 is a wasteful number, since it uses less digits than its factorization.

21369004723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239.

The product of its (nonzero) digits is 54432, while the sum is 37.

The spelling of 21369004723 in words is "twenty-one billion, three hundred sixty-nine million, four thousand, seven hundred twenty-three".