21748614077 has 8 divisors (see below), whose sum is σ = 22522230360. Its totient is φ = 20988452160.

The previous prime is 21748614031. The next prime is 21748614163. The reversal of 21748614077 is 77041684712.

It can be written as a sum of positive squares in 4 ways, for example, as 1326489241 + 20422124836 = 36421^2 + 142906^2 .

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 21748614077 - 2²⁶ = 21681505213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21748644077) 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, 3360302 + ... + 3366767.

It is an arithmetic number, because the mean of its divisors is an integer number (2815278795).

Almost surely, 2^21748614077 is an apocalyptic number.

It is an amenable number.

21748614077 is a deficient number, since it is larger than the sum of its proper divisors (773616283).

21748614077 is an equidigital number, since it uses as much as digits as its factorization.

21748614077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6727183.

The product of its (nonzero) digits is 526848, while the sum is 47.

The spelling of 21748614077 in words is "twenty-one billion, seven hundred forty-eight million, six hundred fourteen thousand, seventy-seven".