21303363025365 has 16 divisors (see below), whose sum is σ = 34208432763648. Its totient is φ = 11320776305856.

The previous prime is 21303363025339. The next prime is 21303363025387. The reversal of 21303363025365 is 56352036330312.

It is a happy number.

It is not a de Polignac number, because 21303363025365 - 2¹¹ = 21303363023317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2563577437 + ... + 2563585746.

It is an arithmetic number, because the mean of its divisors is an integer number (2138027047728).

Almost surely, 2^{21303363025365} is an apocalyptic number.

It is an amenable number.

21303363025365 is a deficient number, since it is larger than the sum of its proper divisors (12905069738283).

21303363025365 is a wasteful number, since it uses less digits than its factorization.

21303363025365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5127163468.

The product of its (nonzero) digits is 874800, while the sum is 42.

Adding to 21303363025365 its reverse (56352036330312), we get a palindrome (77655399355677).

The spelling of 21303363025365 in words is "twenty-one trillion, three hundred three billion, three hundred sixty-three million, twenty-five thousand, three hundred sixty-five".