21364772415735 has 16 divisors (see below), whose sum is σ = 39067012417536. Its totient is φ = 9766753104288.

The previous prime is 21364772415671. The next prime is 21364772415757. The reversal of 21364772415735 is 53751427746312.

It is a happy number.

It is not a de Polignac number, because 21364772415735 - 2⁶ = 21364772415671 is a prime.

It is a super-2 number, since 2×21364772415735² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101737011399 + ... + 101737011608.

It is an arithmetic number, because the mean of its divisors is an integer number (2441688276096).

Almost surely, 2^{21364772415735} is an apocalyptic number.

21364772415735 is a deficient number, since it is larger than the sum of its proper divisors (17702240001801).

21364772415735 is a wasteful number, since it uses less digits than its factorization.

21364772415735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203474023022.

The product of its digits is 29635200, while the sum is 57.

The spelling of 21364772415735 in words is "twenty-one trillion, three hundred sixty-four billion, seven hundred seventy-two million, four hundred fifteen thousand, seven hundred thirty-five".