20647032 has 96 divisors (see below), whose sum is σ = 60999120. Its totient is φ = 5806080.

The previous prime is 20647019. The next prime is 20647049. The reversal of 20647032 is 23074602.

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

It is a junction number, because it is equal to n+sod(n) for n = 20646993 and 20647011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113982 + ... + 114162.

Almost surely, 2^20647032 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 20647032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30499560).

20647032 is an abundant number, since it is smaller than the sum of its proper divisors (40352088).

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

20647032 is a wasteful number, since it uses less digits than its factorization.

20647032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 20647032 is about 4543.9005270802. The cubic root of 20647032 is about 274.3379423733.

The spelling of 20647032 in words is "twenty million, six hundred forty-seven thousand, thirty-two".