21727340495 has 8 divisors (see below), whose sum is σ = 29797495584. Its totient is φ = 14898747744.

The previous prime is 21727340489. The next prime is 21727340507. The reversal of 21727340495 is 59404372712.

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

It is a cyclic number.

It is not a de Polignac number, because 21727340495 - 2¹⁰ = 21727339471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310390544 + ... + 310390613.

It is an arithmetic number, because the mean of its divisors is an integer number (3724686948).

Almost surely, 2^21727340495 is an apocalyptic number.

21727340495 is a deficient number, since it is larger than the sum of its proper divisors (8070155089).

21727340495 is an equidigital number, since it uses as much as digits as its factorization.

21727340495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620781169.

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 21727340495 in words is "twenty-one billion, seven hundred twenty-seven million, three hundred forty thousand, four hundred ninety-five".