33123400220 has 24 divisors (see below), whose sum is σ = 69567411984. Its totient is φ = 13247784576.

The previous prime is 33123400183. The next prime is 33123400231. The reversal of 33123400220 is 2200432133.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 33123400192 and 33123400201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81992 + ... + 270128.

It is an arithmetic number, because the mean of its divisors is an integer number (2898642166).

Almost surely, 2^33123400220 is an apocalyptic number.

It is an amenable number.

33123400220 is an abundant number, since it is smaller than the sum of its proper divisors (36444011764).

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

33123400220 is a wasteful number, since it uses less digits than its factorization.

33123400220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196949 (or 196947 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 33123400220 its reverse (2200432133), we get a palindrome (35323832353).

The spelling of 33123400220 in words is "thirty-three billion, one hundred twenty-three million, four hundred thousand, two hundred twenty".