21342272764 has 24 divisors (see below), whose sum is σ = 38054248400. Its totient is φ = 10470487680.

The previous prime is 21342272759. The next prime is 21342272767. The reversal of 21342272764 is 46727224312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342272767) 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, 7134 + ... + 206725.

Almost surely, 2^21342272764 is an apocalyptic number.

It is an amenable number.

21342272764 is a deficient number, since it is larger than the sum of its proper divisors (16711975636).

21342272764 is a wasteful number, since it uses less digits than its factorization.

21342272764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214333 (or 214331 counting only the distinct ones).

The product of its digits is 225792, while the sum is 40.

The spelling of 21342272764 in words is "twenty-one billion, three hundred forty-two million, two hundred seventy-two thousand, seven hundred sixty-four".