11680020447 has 8 divisors (see below), whose sum is σ = 15575514240. Its totient is φ = 7785603480.

The previous prime is 11680020413. The next prime is 11680020449. The reversal of 11680020447 is 74402008611.

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

It is not a de Polignac number, because 11680020447 - 2¹⁸ = 11679758303 is a prime.

It is a super-4 number, since 4×11680020447⁴ (a number of 41 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11680020449) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 243547 + ... + 287532.

It is an arithmetic number, because the mean of its divisors is an integer number (1946939280).

Almost surely, 2^11680020447 is an apocalyptic number.

11680020447 is a deficient number, since it is larger than the sum of its proper divisors (3895493793).

11680020447 is an equidigital number, since it uses as much as digits as its factorization.

11680020447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538413.

The product of its (nonzero) digits is 10752, while the sum is 33.

The spelling of 11680020447 in words is "eleven billion, six hundred eighty million, twenty thousand, four hundred forty-seven".