20734432 has 12 divisors (see below), whose sum is σ = 40820976. Its totient is φ = 10367200.

The previous prime is 20734411. The next prime is 20734433. The reversal of 20734432 is 23443702.

It is a junction number, because it is equal to n+sod(n) for n = 20734397 and 20734406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20734433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323944 + ... + 324007.

It is an arithmetic number, because the mean of its divisors is an integer number (3401748).

Almost surely, 2^20734432 is an apocalyptic number.

It is an amenable number.

20734432 is a deficient number, since it is larger than the sum of its proper divisors (20086544).

20734432 is an equidigital number, since it uses as much as digits as its factorization.

20734432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647961 (or 647953 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 25.

The square root of 20734432 is about 4553.5076589372. The cubic root of 20734432 is about 274.7244932237.

The spelling of 20734432 in words is "twenty million, seven hundred thirty-four thousand, four hundred thirty-two".