21652420241633 has 4 divisors (see below), whose sum is σ = 22019410415280. Its totient is φ = 21285430067988.

The previous prime is 21652420241603. The next prime is 21652420241651. The reversal of 21652420241633 is 33614202425612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21652420241633 - 2³⁶ = 21583700764897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21652420241603) 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, 183495086735 + ... + 183495086852.

It is an arithmetic number, because the mean of its divisors is an integer number (5504852603820).

Almost surely, 2^{21652420241633} is an apocalyptic number.

It is an amenable number.

21652420241633 is a deficient number, since it is larger than the sum of its proper divisors (366990173647).

21652420241633 is an equidigital number, since it uses as much as digits as its factorization.

21652420241633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366990173646.

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 21652420241633 in words is "twenty-one trillion, six hundred fifty-two billion, four hundred twenty million, two hundred forty-one thousand, six hundred thirty-three".