21525605510 has 8 divisors (see below), whose sum is σ = 38746089936. Its totient is φ = 8610242200.

The previous prime is 21525605503. The next prime is 21525605527. The reversal of 21525605510 is 1550652512.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1076280266 + ... + 1076280285.

It is an arithmetic number, because the mean of its divisors is an integer number (4843261242).

Almost surely, 2^21525605510 is an apocalyptic number.

21525605510 is a deficient number, since it is larger than the sum of its proper divisors (17220484426).

21525605510 is a wasteful number, since it uses less digits than its factorization.

21525605510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152560558.

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 21525605510 in words is "twenty-one billion, five hundred twenty-five million, six hundred five thousand, five hundred ten".