21152361264363 has 80 divisors (see below), whose sum is σ = 36974423566080. Its totient is φ = 11798734860864.

The previous prime is 21152361264341. The next prime is 21152361264427. The reversal of 21152361264363 is 36346216325112.

21152361264363 is a `hidden beast` number, since 2 + 1 + 1 + 5 + 23 + 6 + 1 + 264 + 363 = 666.

It is not a de Polignac number, because 21152361264363 - 2¹⁷ = 21152361133291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21152361264563) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 39646708 + ... + 40176686.

It is an arithmetic number, because the mean of its divisors is an integer number (462180294576).

Almost surely, 2^{21152361264363} is an apocalyptic number.

21152361264363 is a deficient number, since it is larger than the sum of its proper divisors (15822062301717).

21152361264363 is a wasteful number, since it uses less digits than its factorization.

21152361264363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531678 (or 531669 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

Adding to 21152361264363 its reverse (36346216325112), we get a palindrome (57498577589475).

The spelling of 21152361264363 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred sixty-one million, two hundred sixty-four thousand, three hundred sixty-three".