21754776316740 has 24 divisors (see below), whose sum is σ = 60913373687040. Its totient is φ = 5801273684448.

The previous prime is 21754776316709. The next prime is 21754776316747. The reversal of 21754776316740 is 4761367745712.

It is a Harshad number since it is a multiple of its sum of digits (60), and also a Moran number because the ratio is a prime number: 362579605279 = 21754776316740 / (2 + 1 + 7 + 5 + 4 + 7 + 7 + 6 + 3 + 1 + 6 + 7 + 4 + 0).

It is not an unprimeable number, because it can be changed into a prime (21754776316747) 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, 181289802580 + ... + 181289802699.

It is an arithmetic number, because the mean of its divisors is an integer number (2538057236960).

Almost surely, 2^{21754776316740} is an apocalyptic number.

21754776316740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21754776316740 is an abundant number, since it is smaller than the sum of its proper divisors (39158597370300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21754776316740 is a wasteful number, since it uses less digits than its factorization.

21754776316740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362579605291 (or 362579605289 counting only the distinct ones).

The product of its (nonzero) digits is 41489280, while the sum is 60.

The spelling of 21754776316740 in words is "twenty-one trillion, seven hundred fifty-four billion, seven hundred seventy-six million, three hundred sixteen thousand, seven hundred forty".