21745073776330 has 8 divisors (see below), whose sum is σ = 39141132797412. Its totient is φ = 8698029510528.

The previous prime is 21745073776303. The next prime is 21745073776337. The reversal of 21745073776330 is 3367737054712.

It can be written as a sum of positive squares in 2 ways, for example, as 21731698622529 + 13375153801 = 4661727^2 + 115651^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21745073776337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1087253688807 + ... + 1087253688826.

Almost surely, 2^{21745073776330} is an apocalyptic number.

21745073776330 is a deficient number, since it is larger than the sum of its proper divisors (17396059021082).

21745073776330 is a wasteful number, since it uses less digits than its factorization.

21745073776330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174507377640.

The product of its (nonzero) digits is 15558480, while the sum is 55.

The spelling of 21745073776330 in words is "twenty-one trillion, seven hundred forty-five billion, seventy-three million, seven hundred seventy-six thousand, three hundred thirty".