21365023651135 has 32 divisors (see below), whose sum is σ = 26406318323520. Its totient is φ = 16587177984000.

The previous prime is 21365023651129. The next prime is 21365023651157. The reversal of 21365023651135 is 53115632056312.

It is not a de Polignac number, because 21365023651135 - 2²³ = 21365015262527 is a prime.

It is a super-2 number, since 2×21365023651135² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21365023651091 and 21365023651100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26881855 + ... + 27665215.

It is an arithmetic number, because the mean of its divisors is an integer number (825197447610).

Almost surely, 2^{21365023651135} is an apocalyptic number.

21365023651135 is a deficient number, since it is larger than the sum of its proper divisors (5041294672385).

21365023651135 is a wasteful number, since it uses less digits than its factorization.

21365023651135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784539.

The product of its (nonzero) digits is 486000, while the sum is 43.

The spelling of 21365023651135 in words is "twenty-one trillion, three hundred sixty-five billion, twenty-three million, six hundred fifty-one thousand, one hundred thirty-five".