21746807340 has 48 divisors (see below), whose sum is σ = 61335544032. Its totient is φ = 5756816896.

The previous prime is 21746807317. The next prime is 21746807351. The reversal of 21746807340 is 4370864712.

It is a junction number, because it is equal to n+sod(n) for n = 21746807292 and 21746807301.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1314579 + ... + 1331018.

It is an arithmetic number, because the mean of its divisors is an integer number (1277823834).

Almost surely, 2^21746807340 is an apocalyptic number.

21746807340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21746807340 is an abundant number, since it is smaller than the sum of its proper divisors (39588736692).

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

21746807340 is a wasteful number, since it uses less digits than its factorization.

21746807340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2645746 (or 2645744 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 42.

The spelling of 21746807340 in words is "twenty-one billion, seven hundred forty-six million, eight hundred seven thousand, three hundred forty".