21452222504 has 16 divisors (see below), whose sum is σ = 40512292800. Its totient is φ = 10648944432.

The previous prime is 21452222483. The next prime is 21452222507. The reversal of 21452222504 is 40522225412.

It is a happy number.

It is a super-3 number, since 3×21452222504³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21452222507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9644672 + ... + 9646895.

It is an arithmetic number, because the mean of its divisors is an integer number (2532018300).

Almost surely, 2^21452222504 is an apocalyptic number.

It is an amenable number.

21452222504 is a deficient number, since it is larger than the sum of its proper divisors (19060070296).

21452222504 is a wasteful number, since it uses less digits than its factorization.

21452222504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19291712 (or 19291708 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 21452222504 its reverse (40522225412), we get a palindrome (61974447916).

The spelling of 21452222504 in words is "twenty-one billion, four hundred fifty-two million, two hundred twenty-two thousand, five hundred four".