20769432 has 64 divisors (see below), whose sum is σ = 56179200. Its totient is φ = 6376320.

The previous prime is 20769409. The next prime is 20769443. The reversal of 20769432 is 23496702.

It is a junction number, because it is equal to n+sod(n) for n = 20769393 and 20769402.

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 15 ways as a sum of consecutive naturals, for example, 16257 + ... + 17487.

It is an arithmetic number, because the mean of its divisors is an integer number (877800).

Almost surely, 2^20769432 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 20769432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28089600).

20769432 is an abundant number, since it is smaller than the sum of its proper divisors (35409768).

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

20769432 is a wasteful number, since it uses less digits than its factorization.

20769432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296 (or 1292 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 20769432 is about 4557.3492295412. The cubic root of 20769432 is about 274.8789858738.

The spelling of 20769432 in words is "twenty million, seven hundred sixty-nine thousand, four hundred thirty-two".