21524412152 has 64 divisors (see below), whose sum is σ = 42201907200. Its totient is φ = 10283495040.

The previous prime is 21524412121. The next prime is 21524412157. The reversal of 21524412152 is 25121442512.

It is a super-2 number, since 2×21524412152² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21524412157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4202249 + ... + 4207367.

It is an arithmetic number, because the mean of its divisors is an integer number (659404800).

Almost surely, 2^21524412152 is an apocalyptic number.

It is an amenable number.

21524412152 is a deficient number, since it is larger than the sum of its proper divisors (20677495048).

21524412152 is a wasteful number, since it uses less digits than its factorization.

21524412152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5436 (or 5432 counting only the distinct ones).

The product of its digits is 6400, while the sum is 29.

Adding to 21524412152 its reverse (25121442512), we get a palindrome (46645854664).

The spelling of 21524412152 in words is "twenty-one billion, five hundred twenty-four million, four hundred twelve thousand, one hundred fifty-two".