20976732 has 72 divisors (see below), whose sum is σ = 62864256. Its totient is φ = 5991408.

The previous prime is 20976731. The next prime is 20976751. The reversal of 20976732 is 23767902.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20976731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5263 + ... + 8345.

Almost surely, 2^20976732 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 20976732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31432128).

20976732 is an abundant number, since it is smaller than the sum of its proper divisors (41887524).

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

20976732 is a wasteful number, since it uses less digits than its factorization.

20976732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109 (or 3095 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 20976732 is about 4580.0362443981. The cubic root of 20976732 is about 275.7904837150.

The spelling of 20976732 in words is "twenty million, nine hundred seventy-six thousand, seven hundred thirty-two".