21500030425153 has 8 divisors (see below), whose sum is σ = 24575427171200. Its totient is φ = 18425624636160.

The previous prime is 21500030425117. The next prime is 21500030425169. The reversal of 21500030425153 is 35152403000512.

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

It is not a de Polignac number, because 21500030425153 - 2²⁵ = 21499996870721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21500030425253) 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, 247692768 + ... + 247779553.

It is an arithmetic number, because the mean of its divisors is an integer number (3071928396400).

Almost surely, 2^{21500030425153} is an apocalyptic number.

It is an amenable number.

21500030425153 is a deficient number, since it is larger than the sum of its proper divisors (3075396746047).

21500030425153 is an equidigital number, since it uses as much as digits as its factorization.

21500030425153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495478527.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 21500030425153 its reverse (35152403000512), we get a palindrome (56652433425665).

The spelling of 21500030425153 in words is "twenty-one trillion, five hundred billion, thirty million, four hundred twenty-five thousand, one hundred fifty-three".