21634541224 has 32 divisors (see below), whose sum is σ = 42981791400. Its totient is φ = 10173644800.

The previous prime is 21634541147. The next prime is 21634541231. The reversal of 21634541224 is 42214543612.

It can be written as a sum of positive squares in 4 ways, for example, as 20140718724 + 1493822500 = 141918^2 + 38650^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 21634541224.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135174 + ... + 248074.

Almost surely, 2^21634541224 is an apocalyptic number.

It is an amenable number.

21634541224 is a deficient number, since it is larger than the sum of its proper divisors (21347250176).

21634541224 is a wasteful number, since it uses less digits than its factorization.

21634541224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114333 (or 114329 counting only the distinct ones).

The product of its digits is 46080, while the sum is 34.

The spelling of 21634541224 in words is "twenty-one billion, six hundred thirty-four million, five hundred forty-one thousand, two hundred twenty-four".