33906335138 has 24 divisors (see below), whose sum is σ = 55410675408. Its totient is φ = 15553045872.

The previous prime is 33906335137. The next prime is 33906335143. The reversal of 33906335138 is 83153360933.

It is a super-2 number, since 2×33906335138² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33906335137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 252620 + ... + 362807.

It is an arithmetic number, because the mean of its divisors is an integer number (2308778142).

Almost surely, 2^33906335138 is an apocalyptic number.

33906335138 is a deficient number, since it is larger than the sum of its proper divisors (21504340270).

33906335138 is a wasteful number, since it uses less digits than its factorization.

33906335138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615618 (or 615605 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 44.

The spelling of 33906335138 in words is "thirty-three billion, nine hundred six million, three hundred thirty-five thousand, one hundred thirty-eight".