33489021891 has 16 divisors (see below), whose sum is σ = 48536216064. Its totient is φ = 20416022304.

The previous prime is 33489021889. The next prime is 33489021931. The reversal of 33489021891 is 19812098433.

It is not a de Polignac number, because 33489021891 - 2¹ = 33489021889 is a prime.

It is a super-2 number, since 2×33489021891² (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 33489021891.

It is not an unprimeable number, because it can be changed into a prime (33489021491) 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, 4008411 + ... + 4016756.

It is an arithmetic number, because the mean of its divisors is an integer number (3033513504).

Almost surely, 2^33489021891 is an apocalyptic number.

33489021891 is a deficient number, since it is larger than the sum of its proper divisors (15047194173).

33489021891 is a wasteful number, since it uses less digits than its factorization.

33489021891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8025290.

The product of its (nonzero) digits is 373248, while the sum is 48.

The spelling of 33489021891 in words is "thirty-three billion, four hundred eighty-nine million, twenty-one thousand, eight hundred ninety-one".