21004314244 has 24 divisors (see below), whose sum is σ = 37949990400. Its totient is φ = 10161579840.

The previous prime is 21004314239. The next prime is 21004314251. The reversal of 21004314244 is 44241340012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926112 + ... + 948520.

It is an arithmetic number, because the mean of its divisors is an integer number (1581249600).

Almost surely, 2^21004314244 is an apocalyptic number.

It is an amenable number.

21004314244 is a deficient number, since it is larger than the sum of its proper divisors (16945676156).

21004314244 is a wasteful number, since it uses less digits than its factorization.

21004314244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30003 (or 30001 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21004314244 its reverse (44241340012), we get a palindrome (65245654256).

The spelling of 21004314244 in words is "twenty-one billion, four million, three hundred fourteen thousand, two hundred forty-four".