33920919447 has 16 divisors (see below), whose sum is σ = 45314496000. Its totient is φ = 22570680384.

The previous prime is 33920919427. The next prime is 33920919457. The reversal of 33920919447 is 74491902933.

It is not a de Polignac number, because 33920919447 - 2⁸ = 33920919191 is a prime.

It is a super-2 number, since 2×33920919447² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33920919447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33920919427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6509379 + ... + 6514587.

It is an arithmetic number, because the mean of its divisors is an integer number (2832156000).

Almost surely, 2^33920919447 is an apocalyptic number.

33920919447 is a deficient number, since it is larger than the sum of its proper divisors (11393576553).

33920919447 is a wasteful number, since it uses less digits than its factorization.

33920919447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8950.

The product of its (nonzero) digits is 1469664, while the sum is 51.

The spelling of 33920919447 in words is "thirty-three billion, nine hundred twenty million, nine hundred nineteen thousand, four hundred forty-seven".