21152345623606 has 8 divisors (see below), whose sum is σ = 33594901872840. Its totient is φ = 9954044999328.

The previous prime is 21152345623553. The next prime is 21152345623627. The reversal of 21152345623606 is 60632654325112.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311063906196 + ... + 311063906263.

It is an arithmetic number, because the mean of its divisors is an integer number (4199362734105).

Almost surely, 2^{21152345623606} is an apocalyptic number.

21152345623606 is a deficient number, since it is larger than the sum of its proper divisors (12442556249234).

21152345623606 is a wasteful number, since it uses less digits than its factorization.

21152345623606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622127812478.

The product of its (nonzero) digits is 1555200, while the sum is 46.

Adding to 21152345623606 its reverse (60632654325112), we get a palindrome (81784999948718).

The spelling of 21152345623606 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred forty-five million, six hundred twenty-three thousand, six hundred six".