33870051921 has 32 divisors (see below), whose sum is σ = 46551718528. Its totient is φ = 21897216000.

The previous prime is 33870051913. The next prime is 33870051923. The reversal of 33870051921 is 12915007833.

It is not a de Polignac number, because 33870051921 - 2³ = 33870051913 is a prime.

It is a super-2 number, since 2×33870051921² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33870051921.

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 31 ways as a sum of consecutive naturals, for example, 3758421 + ... + 3767421.

It is an arithmetic number, because the mean of its divisors is an integer number (1454741204).

Almost surely, 2^33870051921 is an apocalyptic number.

It is an amenable number.

33870051921 is a deficient number, since it is larger than the sum of its proper divisors (12681666607).

33870051921 is a wasteful number, since it uses less digits than its factorization.

33870051921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9361.

The product of its (nonzero) digits is 45360, while the sum is 39.

The spelling of 33870051921 in words is "thirty-three billion, eight hundred seventy million, fifty-one thousand, nine hundred twenty-one".