180121632 has 24 divisors (see below), whose sum is σ = 472819536. Its totient is φ = 60040512.

The previous prime is 180121603. The next prime is 180121637. The reversal of 180121632 is 236121081.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (180121637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 938038 + ... + 938229.

It is an arithmetic number, because the mean of its divisors is an integer number (19700814).

Almost surely, 2^180121632 is an apocalyptic number.

180121632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

180121632 is an abundant number, since it is smaller than the sum of its proper divisors (292697904).

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

180121632 is a wasteful number, since it uses less digits than its factorization.

180121632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876280 (or 1876272 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 180121632 is about 13420.9400564938. The cubic root of 180121632 is about 564.7487665758.

The spelling of 180121632 in words is "one hundred eighty million, one hundred twenty-one thousand, six hundred thirty-two".