164021432 has 32 divisors (see below), whose sum is σ = 315841680. Its totient is φ = 79822080.

The previous prime is 164021411. The next prime is 164021447. The reversal of 164021432 is 234120461.

It is a junction number, because it is equal to n+sod(n) for n = 164021398 and 164021407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54068 + ... + 57020.

Almost surely, 2^164021432 is an apocalyptic number.

It is an amenable number.

164021432 is a deficient number, since it is larger than the sum of its proper divisors (151820248).

164021432 is a wasteful number, since it uses less digits than its factorization.

164021432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143 (or 3139 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 164021432 is about 12807.0852265455. The cubic root of 164021432 is about 547.3942104285.

Adding to 164021432 its reverse (234120461), we get a palindrome (398141893).

The spelling of 164021432 in words is "one hundred sixty-four million, twenty-one thousand, four hundred thirty-two".