21241545436 has 24 divisors (see below), whose sum is σ = 38536963920. Its totient is φ = 10232554752.

The previous prime is 21241545389. The next prime is 21241545497. The reversal of 21241545436 is 63454514212.

It is a junction number, because it is equal to n+sod(n) for n = 21241545395 and 21241545404.

It is a congruent number.

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, 141885 + ... + 250228.

It is an arithmetic number, because the mean of its divisors is an integer number (1605706830).

Almost surely, 2^21241545436 is an apocalyptic number.

It is an amenable number.

21241545436 is a deficient number, since it is larger than the sum of its proper divisors (17295418484).

21241545436 is a wasteful number, since it uses less digits than its factorization.

21241545436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392613 (or 392611 counting only the distinct ones).

The product of its digits is 115200, while the sum is 37.

The spelling of 21241545436 in words is "twenty-one billion, two hundred forty-one million, five hundred forty-five thousand, four hundred thirty-six".