21748594195336 has 8 divisors (see below), whose sum is σ = 40778614116270. Its totient is φ = 10874297097664.

The previous prime is 21748594195327. The next prime is 21748594195337. The reversal of 21748594195336 is 63359149584712.

It can be written as a sum of positive squares in only one way, i.e., 21474234040900 + 274360154436 = 4634030^2 + 523794^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (21748594195337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1359287137201 + ... + 1359287137216.

Almost surely, 2^{21748594195336} is an apocalyptic number.

It is an amenable number.

21748594195336 is a deficient number, since it is larger than the sum of its proper divisors (19030019920934).

21748594195336 is a wasteful number, since it uses less digits than its factorization.

21748594195336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718574274423 (or 2718574274419 counting only the distinct ones).

The product of its digits is 195955200, while the sum is 67.

The spelling of 21748594195336 in words is "twenty-one trillion, seven hundred forty-eight billion, five hundred ninety-four million, one hundred ninety-five thousand, three hundred thirty-six".