21524054212 has 48 divisors (see below), whose sum is σ = 42632013312. Its totient is φ = 9452241920.

The previous prime is 21524054173. The next prime is 21524054219. The reversal of 21524054212 is 21245042512.

It is a happy number.

It is a super-2 number, since 2×21524054212² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21524054219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103708 + ... + 231955.

It is an arithmetic number, because the mean of its divisors is an integer number (888166944).

Almost surely, 2^21524054212 is an apocalyptic number.

It is an amenable number.

21524054212 is a deficient number, since it is larger than the sum of its proper divisors (21107959100).

21524054212 is a wasteful number, since it uses less digits than its factorization.

21524054212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335748 (or 335746 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 21524054212 its reverse (21245042512), we get a palindrome (42769096724).

The spelling of 21524054212 in words is "twenty-one billion, five hundred twenty-four million, fifty-four thousand, two hundred twelve".