21941503804 has 12 divisors (see below), whose sum is σ = 41888325528. Its totient is φ = 9973410800.

The previous prime is 21941503769. The next prime is 21941503817. The reversal of 21941503804 is 40830514912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249335227 + ... + 249335314.

It is an arithmetic number, because the mean of its divisors is an integer number (3490693794).

Almost surely, 2^21941503804 is an apocalyptic number.

It is an amenable number.

21941503804 is a deficient number, since it is larger than the sum of its proper divisors (19946821724).

21941503804 is a wasteful number, since it uses less digits than its factorization.

21941503804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498670556 (or 498670554 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 21941503804 in words is "twenty-one billion, nine hundred forty-one million, five hundred three thousand, eight hundred four".