33400421404 has 96 divisors (see below), whose sum is σ = 72336337920. Its totient is φ = 13172792832.

The previous prime is 33400421393. The next prime is 33400421413. The reversal of 33400421404 is 40412400433.

It is a super-2 number, since 2×33400421404² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 17458752 + ... + 17460664.

It is an arithmetic number, because the mean of its divisors is an integer number (753503520).

Almost surely, 2^33400421404 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 33400421404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36168168960).

33400421404 is an abundant number, since it is smaller than the sum of its proper divisors (38935916516).

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

33400421404 is a wasteful number, since it uses less digits than its factorization.

33400421404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2867 (or 2865 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 33400421404 its reverse (40412400433), we get a palindrome (73812821837).

The spelling of 33400421404 in words is "thirty-three billion, four hundred million, four hundred twenty-one thousand, four hundred four".