33455213988 has 96 divisors (see below), whose sum is σ = 94733856000. Its totient is φ = 8970448896.

The previous prime is 33455213977. The next prime is 33455213993. The reversal of 33455213988 is 88931255433.

It is a super-2 number, since 2×33455213988² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 33455213988.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 464808 + ... + 531936.

It is an arithmetic number, because the mean of its divisors is an integer number (986811000).

Almost surely, 2^33455213988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33455213988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47366928000).

33455213988 is an abundant number, since it is smaller than the sum of its proper divisors (61278642012).

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

33455213988 is a wasteful number, since it uses less digits than its factorization.

33455213988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67509 (or 67507 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 51.

The spelling of 33455213988 in words is "thirty-three billion, four hundred fifty-five million, two hundred thirteen thousand, nine hundred eighty-eight".