21277334605 has 32 divisors (see below), whose sum is σ = 26451532800. Its totient is φ = 16419981312.

The previous prime is 21277334587. The next prime is 21277334641. The reversal of 21277334605 is 50643377212.

It is a cyclic number.

It is not a de Polignac number, because 21277334605 - 2²¹ = 21275237453 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14785476 + ... + 14786914.

It is an arithmetic number, because the mean of its divisors is an integer number (826610400).

Almost surely, 2^21277334605 is an apocalyptic number.

It is an amenable number.

21277334605 is a deficient number, since it is larger than the sum of its proper divisors (5174198195).

21277334605 is a wasteful number, since it uses less digits than its factorization.

21277334605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2293.

The product of its (nonzero) digits is 211680, while the sum is 40.

The spelling of 21277334605 in words is "twenty-one billion, two hundred seventy-seven million, three hundred thirty-four thousand, six hundred five".