21525500354 has 8 divisors (see below), whose sum is σ = 32295534348. Its totient is φ = 10760322240.

The previous prime is 21525500341. The next prime is 21525500363. The reversal of 21525500354 is 45300552512.

It can be written as a sum of positive squares in 2 ways, for example, as 21498304129 + 27196225 = 146623^2 + 5215^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21525500354.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1202867 + ... + 1220630.

Almost surely, 2^21525500354 is an apocalyptic number.

21525500354 is a deficient number, since it is larger than the sum of its proper divisors (10770033994).

21525500354 is a wasteful number, since it uses less digits than its factorization.

21525500354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2427940.

The product of its (nonzero) digits is 30000, while the sum is 32.

The spelling of 21525500354 in words is "twenty-one billion, five hundred twenty-five million, five hundred thousand, three hundred fifty-four".