21652690328359 has 4 divisors (see below), whose sum is σ = 21691564099704. Its totient is φ = 21613816557016.

The previous prime is 21652690328309. The next prime is 21652690328383. The reversal of 21652690328359 is 95382309625612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21652690328359 - 2¹⁵ = 21652690295591 is a prime.

It is a super-2 number, since 2×21652690328359² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21652690328297 and 21652690328306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21652690328309) 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, 19436884837 + ... + 19436885950.

It is an arithmetic number, because the mean of its divisors is an integer number (5422891024926).

Almost surely, 2^{21652690328359} is an apocalyptic number.

21652690328359 is a deficient number, since it is larger than the sum of its proper divisors (38873771345).

21652690328359 is an equidigital number, since it uses as much as digits as its factorization.

21652690328359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38873771344.

The product of its (nonzero) digits is 41990400, while the sum is 61.

The spelling of 21652690328359 in words is "twenty-one trillion, six hundred fifty-two billion, six hundred ninety million, three hundred twenty-eight thousand, three hundred fifty-nine".