21775355132 has 6 divisors (see below), whose sum is σ = 38106871488. Its totient is φ = 10887677564.

The previous prime is 21775355113. The next prime is 21775355159. The reversal of 21775355132 is 23155357712.

It is a super-2 number, since 2×21775355132² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21775355132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2721919388 + ... + 2721919395.

It is an arithmetic number, because the mean of its divisors is an integer number (6351145248).

Almost surely, 2^21775355132 is an apocalyptic number.

It is an amenable number.

21775355132 is a deficient number, since it is larger than the sum of its proper divisors (16331516356).

21775355132 is a wasteful number, since it uses less digits than its factorization.

21775355132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5443838787 (or 5443838785 counting only the distinct ones).

The product of its digits is 220500, while the sum is 41.

The spelling of 21775355132 in words is "twenty-one billion, seven hundred seventy-five million, three hundred fifty-five thousand, one hundred thirty-two".