21903965004 has 24 divisors (see below), whose sum is σ = 51171075648. Its totient is φ = 7292489680.

The previous prime is 21903965003. The next prime is 21903965011. The reversal of 21903965004 is 40056930912.

It is not an unprimeable number, because it can be changed into a prime (21903965003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1093662 + ... + 1113509.

It is an arithmetic number, because the mean of its divisors is an integer number (2132128152).

Almost surely, 2^21903965004 is an apocalyptic number.

It is an amenable number.

21903965004 is an abundant number, since it is smaller than the sum of its proper divisors (29267110644).

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

21903965004 is a wasteful number, since it uses less digits than its factorization.

21903965004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208005 (or 2208003 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 39.

The spelling of 21903965004 in words is "twenty-one billion, nine hundred three million, nine hundred sixty-five thousand, four".