20739440347346 has 32 divisors (see below), whose sum is σ = 35834302834560. Its totient is φ = 8818165213056.

The previous prime is 20739440347319. The next prime is 20739440347357. The reversal of 20739440347346 is 64374304493702.

It is a happy number.

It is a super-3 number, since 3×20739440347346³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 20739440347291 and 20739440347300.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38240 + ... + 6440523.

It is an arithmetic number, because the mean of its divisors is an integer number (1119821963580).

Almost surely, 2^{20739440347346} is an apocalyptic number.

20739440347346 is a deficient number, since it is larger than the sum of its proper divisors (15094862487214).

20739440347346 is a wasteful number, since it uses less digits than its factorization.

20739440347346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6480578.

The product of its (nonzero) digits is 36578304, while the sum is 56.

The spelling of 20739440347346 in words is "twenty trillion, seven hundred thirty-nine billion, four hundred forty million, three hundred forty-seven thousand, three hundred forty-six".