33870051920 has 40 divisors (see below), whose sum is σ = 81288130560. Its totient is φ = 13110986880.

The previous prime is 33870051913. The next prime is 33870051923. The reversal of 33870051920 is 2915007833.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×33870051920² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33870051923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6826160 + ... + 6831119.

It is an arithmetic number, because the mean of its divisors is an integer number (2032203264).

Almost surely, 2^33870051920 is an apocalyptic number.

It is an amenable number.

33870051920 is an abundant number, since it is smaller than the sum of its proper divisors (47418078640).

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

33870051920 is a wasteful number, since it uses less digits than its factorization.

33870051920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13657323 (or 13657317 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 33870051920 in words is "thirty-three billion, eight hundred seventy million, fifty-one thousand, nine hundred twenty".