21524412158 has 8 divisors (see below), whose sum is σ = 32503307400. Its totient is φ = 10689976360.

The previous prime is 21524412157. The next prime is 21524412179. The reversal of 21524412158 is 85121442512.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 36114488 + ... + 36115083.

It is an arithmetic number, because the mean of its divisors is an integer number (4062913425).

Almost surely, 2^21524412158 is an apocalyptic number.

21524412158 is a deficient number, since it is larger than the sum of its proper divisors (10978895242).

21524412158 is a wasteful number, since it uses less digits than its factorization.

21524412158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72229722.

The product of its digits is 25600, while the sum is 35.

The spelling of 21524412158 in words is "twenty-one billion, five hundred twenty-four million, four hundred twelve thousand, one hundred fifty-eight".