21365506270306 has 12 divisors (see below), whose sum is σ = 35226599181606. Its totient is φ = 9711593759120.

The previous prime is 21365506270231. The next prime is 21365506270337. The reversal of 21365506270306 is 60307260556312.

It can be written as a sum of positive squares in only one way, i.e., 20836111786281 + 529394484025 = 4564659^2 + 727595^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44143607755 + ... + 44143608238.

Almost surely, 2^{21365506270306} is an apocalyptic number.

21365506270306 is a deficient number, since it is larger than the sum of its proper divisors (13861092911300).

21365506270306 is a wasteful number, since it uses less digits than its factorization.

21365506270306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88287216017 (or 88287216006 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 46.

The spelling of 21365506270306 in words is "twenty-one trillion, three hundred sixty-five billion, five hundred six million, two hundred seventy thousand, three hundred six".