21224032514204 has 24 divisors (see below), whose sum is σ = 40007753588880. Its totient is φ = 9793597423104.

The previous prime is 21224032514203. The next prime is 21224032514327. The reversal of 21224032514204 is 40241523042212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21224032514203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43712309 + ... + 44195180.

It is an arithmetic number, because the mean of its divisors is an integer number (1666989732870).

Almost surely, 2^{21224032514204} is an apocalyptic number.

It is an amenable number.

21224032514204 is a deficient number, since it is larger than the sum of its proper divisors (18783721074676).

21224032514204 is a wasteful number, since it uses less digits than its factorization.

21224032514204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87912149 (or 87912147 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 21224032514204 its reverse (40241523042212), we get a palindrome (61465555556416).

The spelling of 21224032514204 in words is "twenty-one trillion, two hundred twenty-four billion, thirty-two million, five hundred fourteen thousand, two hundred four".