21135266616774 has 32 divisors (see below), whose sum is σ = 42347296938240. Its totient is φ = 7032301056032.

The previous prime is 21135266616757. The next prime is 21135266616791. The reversal of 21135266616774 is 47761666253112.

It is an interprime number because it is at equal distance from previous prime (21135266616757) and next prime (21135266616791).

It is a super-3 number, since 3×21135266616774³ (a number of 41 digits) contains 333 as substring.

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, 13054057 + ... + 14583515.

It is an arithmetic number, because the mean of its divisors is an integer number (1323353029320).

Almost surely, 2^{21135266616774} is an apocalyptic number.

21135266616774 is an abundant number, since it is smaller than the sum of its proper divisors (21212030321466).

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

21135266616774 is a wasteful number, since it uses less digits than its factorization.

21135266616774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533644.

The product of its digits is 15240960, while the sum is 57.

The spelling of 21135266616774 in words is "twenty-one trillion, one hundred thirty-five billion, two hundred sixty-six million, six hundred sixteen thousand, seven hundred seventy-four".