20147632 has 40 divisors (see below), whose sum is σ = 41541984. Its totient is φ = 9444864.

The previous prime is 20147623. The next prime is 20147671. The reversal of 20147632 is 23674102.

It is a junction number, because it is equal to n+sod(n) for n = 20147597 and 20147606.

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, 18988 + ... + 20020.

Almost surely, 2^20147632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20147632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20770992).

20147632 is an abundant number, since it is smaller than the sum of its proper divisors (21394352).

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

20147632 is a wasteful number, since it uses less digits than its factorization.

20147632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117 (or 1111 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 20147632 is about 4488.6113665587. The cubic root of 20147632 is about 272.1080164991.

The spelling of 20147632 in words is "twenty million, one hundred forty-seven thousand, six hundred thirty-two".