33521837972 has 24 divisors (see below), whose sum is σ = 69206376960. Its totient is φ = 13903066080.

The previous prime is 33521837971. The next prime is 33521838011. The reversal of 33521837972 is 27973812533.

It is a super-2 number, since 2×33521837972² (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 33521837972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33521837971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19308947 + ... + 19310682.

It is an arithmetic number, because the mean of its divisors is an integer number (2883599040).

Almost surely, 2^33521837972 is an apocalyptic number.

It is an amenable number.

33521837972 is an abundant number, since it is smaller than the sum of its proper divisors (35684538988).

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

33521837972 is a wasteful number, since it uses less digits than its factorization.

33521837972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38619671 (or 38619669 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 50.

The spelling of 33521837972 in words is "thirty-three billion, five hundred twenty-one million, eight hundred thirty-seven thousand, nine hundred seventy-two".