21525521005023 has 8 divisors (see below), whose sum is σ = 32800793912448. Its totient is φ = 12300297717144.

The previous prime is 21525521005003. The next prime is 21525521005069. The reversal of 21525521005023 is 32050012552512.

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

It is not a de Polignac number, because 21525521005023 - 2⁶ = 21525521004959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21525521005003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512512404861 + ... + 512512404902.

It is an arithmetic number, because the mean of its divisors is an integer number (4100099239056).

Almost surely, 2^{21525521005023} is an apocalyptic number.

21525521005023 is a deficient number, since it is larger than the sum of its proper divisors (11275272907425).

21525521005023 is a wasteful number, since it uses less digits than its factorization.

21525521005023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025024809773.

The product of its (nonzero) digits is 30000, while the sum is 33.

Adding to 21525521005023 its reverse (32050012552512), we get a palindrome (53575533557535).

The spelling of 21525521005023 in words is "twenty-one trillion, five hundred twenty-five billion, five hundred twenty-one million, five thousand, twenty-three".