21152153323356 has 48 divisors (see below), whose sum is σ = 53842289880960. Its totient is φ = 6409690448320.

The previous prime is 21152153323351. The next prime is 21152153323409. The reversal of 21152153323356 is 65332335125112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152153323351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17181355 + ... + 18371261.

It is an arithmetic number, because the mean of its divisors is an integer number (1121714372520).

Almost surely, 2^{21152153323356} is an apocalyptic number.

It is an amenable number.

21152153323356 is an abundant number, since it is smaller than the sum of its proper divisors (32690136557604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21152153323356 is a wasteful number, since it uses less digits than its factorization.

21152153323356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324594 (or 1324592 counting only the distinct ones).

The product of its digits is 486000, while the sum is 42.

Adding to 21152153323356 its reverse (65332335125112), we get a palindrome (86484488448468).

The spelling of 21152153323356 in words is "twenty-one trillion, one hundred fifty-two billion, one hundred fifty-three million, three hundred twenty-three thousand, three hundred fifty-six".