21412506224 has 10 divisors (see below), whose sum is σ = 41486730840. Its totient is φ = 10706253104.

The previous prime is 21412506221. The next prime is 21412506229. The reversal of 21412506224 is 42260521412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21412506221) by changing a digit.

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 as a sum of consecutive naturals, namely, 669140804 + ... + 669140835.

It is an arithmetic number, because the mean of its divisors is an integer number (4148673084).

Almost surely, 2^21412506224 is an apocalyptic number.

It is an amenable number.

21412506224 is a deficient number, since it is larger than the sum of its proper divisors (20074224616).

21412506224 is a wasteful number, since it uses less digits than its factorization.

21412506224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338281647 (or 1338281641 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The spelling of 21412506224 in words is "twenty-one billion, four hundred twelve million, five hundred six thousand, two hundred twenty-four".