21369004788 has 48 divisors (see below), whose sum is σ = 50234691584. Its totient is φ = 7069701600.

The previous prime is 21369004747. The next prime is 21369004793. The reversal of 21369004788 is 88740096312.

It is a congruent number.

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, 2400081 + ... + 2408967.

Almost surely, 2^21369004788 is an apocalyptic number.

It is an amenable number.

21369004788 is an abundant number, since it is smaller than the sum of its proper divisors (28865686796).

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

21369004788 is a wasteful number, since it uses less digits than its factorization.

21369004788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10372 (or 10370 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 21369004788 in words is "twenty-one billion, three hundred sixty-nine million, four thousand, seven hundred eighty-eight".