21154545224 has 16 divisors (see below), whose sum is σ = 40587209520. Its totient is φ = 10331289360.

The previous prime is 21154545193. The next prime is 21154545241. The reversal of 21154545224 is 42254545112.

It is a super-2 number, since 2×21154545224² (a number of 21 digits) contains 22 as substring.

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, 30747542 + ... + 30748229.

It is an arithmetic number, because the mean of its divisors is an integer number (2536700595).

Almost surely, 2^21154545224 is an apocalyptic number.

It is an amenable number.

21154545224 is a deficient number, since it is larger than the sum of its proper divisors (19432664296).

21154545224 is a wasteful number, since it uses less digits than its factorization.

21154545224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61495820 (or 61495816 counting only the distinct ones).

The product of its digits is 64000, while the sum is 35.

The spelling of 21154545224 in words is "twenty-one billion, one hundred fifty-four million, five hundred forty-five thousand, two hundred twenty-four".