21360506461350 has 96 divisors (see below), whose sum is σ = 60543499610880. Its totient is φ = 4882262663040.

The previous prime is 21360506461297. The next prime is 21360506461379. The reversal of 21360506461350 is 5316460506312.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39229564 + ... + 39770336.

It is an arithmetic number, because the mean of its divisors is an integer number (630661454280).

Almost surely, 2^{21360506461350} is an apocalyptic number.

21360506461350 is an abundant number, since it is smaller than the sum of its proper divisors (39182993149530).

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

21360506461350 is a wasteful number, since it uses less digits than its factorization.

21360506461350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578414 (or 578409 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

Adding to 21360506461350 its reverse (5316460506312), we get a palindrome (26676966967662).

The spelling of 21360506461350 in words is "twenty-one trillion, three hundred sixty billion, five hundred six million, four hundred sixty-one thousand, three hundred fifty".