33138573018 has 16 divisors (see below), whose sum is σ = 69765417120. Its totient is φ = 10464812496.

The previous prime is 33138572969. The next prime is 33138573019. The reversal of 33138573018 is 81037583133.

It is not an unprimeable number, because it can be changed into a prime (33138573019) 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, 145344505 + ... + 145344732.

It is an arithmetic number, because the mean of its divisors is an integer number (4360338570).

Almost surely, 2^33138573018 is an apocalyptic number.

33138573018 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

33138573018 is an abundant number, since it is smaller than the sum of its proper divisors (36626844102).

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

33138573018 is a wasteful number, since it uses less digits than its factorization.

33138573018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290689261.

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 33138573018 in words is "thirty-three billion, one hundred thirty-eight million, five hundred seventy-three thousand, eighteen".