21357120604527 has 24 divisors (see below), whose sum is σ = 32665302590544. Its totient is φ = 13399942742784.

The previous prime is 21357120604517. The next prime is 21357120604613. The reversal of 21357120604527 is 72540602175312.

21357120604527 is a `hidden beast` number, since 2 + 1 + 3 + 5 + 7 + 12 + 0 + 604 + 5 + 27 = 666.

It is not a de Polignac number, because 21357120604527 - 2¹⁰ = 21357120603503 is a prime.

It is a super-2 number, since 2×21357120604527² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21357120604517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 277113 + ... + 6541485.

It is an arithmetic number, because the mean of its divisors is an integer number (1361054274606).

Almost surely, 2^{21357120604527} is an apocalyptic number.

21357120604527 is a deficient number, since it is larger than the sum of its proper divisors (11308181986017).

21357120604527 is a wasteful number, since it uses less digits than its factorization.

21357120604527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6286679 (or 6286676 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

Adding to 21357120604527 its reverse (72540602175312), we get a palindrome (93897722779839).

The spelling of 21357120604527 in words is "twenty-one trillion, three hundred fifty-seven billion, one hundred twenty million, six hundred four thousand, five hundred twenty-seven".