21648747240127 has 8 divisors (see below), whose sum is σ = 25208244765216. Its totient is φ = 18205954552032.

The previous prime is 21648747240103. The next prime is 21648747240137. The reversal of 21648747240127 is 72104274784612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21648747240127 is a prime.

It is a super-2 number, since 2×21648747240127² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21648747240137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29176208848 + ... + 29176209589.

It is an arithmetic number, because the mean of its divisors is an integer number (3151030595652).

Almost surely, 2^{21648747240127} is an apocalyptic number.

21648747240127 is a deficient number, since it is larger than the sum of its proper divisors (3559497525089).

21648747240127 is an equidigital number, since it uses as much as digits as its factorization.

21648747240127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58352418497.

The product of its (nonzero) digits is 8429568, while the sum is 55.

The spelling of 21648747240127 in words is "twenty-one trillion, six hundred forty-eight billion, seven hundred forty-seven million, two hundred forty thousand, one hundred twenty-seven".