20738336 has 12 divisors (see below), whose sum is σ = 40828662. Its totient is φ = 10369152.

The previous prime is 20738321. The next prime is 20738359. The reversal of 20738336 is 63383702.

It can be written as a sum of positive squares in only one way, i.e., 20611600 + 126736 = 4540^2 + 356^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 648073 = 20738336 / (2 + 0 + 7 + 3 + 8 + 3 + 3 + 6).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324005 + ... + 324068.

Almost surely, 2^20738336 is an apocalyptic number.

It is an amenable number.

20738336 is a deficient number, since it is larger than the sum of its proper divisors (20090326).

20738336 is an equidigital number, since it uses as much as digits as its factorization.

20738336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648083 (or 648075 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 20738336 is about 4553.9363192737. The cubic root of 20738336 is about 274.7417343859.

The spelling of 20738336 in words is "twenty million, seven hundred thirty-eight thousand, three hundred thirty-six".