21186934004 has 48 divisors (see below), whose sum is σ = 38792871936. Its totient is φ = 10113465600.

The previous prime is 21186934001. The next prime is 21186934019. The reversal of 21186934004 is 40043968112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21186934001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2846672 + ... + 2854104.

It is an arithmetic number, because the mean of its divisors is an integer number (808184832).

Almost surely, 2^21186934004 is an apocalyptic number.

It is an amenable number.

21186934004 is a deficient number, since it is larger than the sum of its proper divisors (17605937932).

21186934004 is a wasteful number, since it uses less digits than its factorization.

21186934004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7776 (or 7774 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 21186934004 in words is "twenty-one billion, one hundred eighty-six million, nine hundred thirty-four thousand, four".