20383904 has 12 divisors (see below), whose sum is σ = 40130874. Its totient is φ = 10191936.

The previous prime is 20383877. The next prime is 20383907. The reversal of 20383904 is 40938302.

It can be written as a sum of positive squares in only one way, i.e., 12250000 + 8133904 = 3500^2 + 2852^2 .

It is not an unprimeable number, because it can be changed into a prime (20383907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318467 + ... + 318530.

Almost surely, 2^20383904 is an apocalyptic number.

It is an amenable number.

20383904 is a deficient number, since it is larger than the sum of its proper divisors (19746970).

20383904 is an equidigital number, since it uses as much as digits as its factorization.

20383904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637007 (or 636999 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20383904 is about 4514.8537074860. The cubic root of 20383904 is about 273.1675589415.

The spelling of 20383904 in words is "twenty million, three hundred eighty-three thousand, nine hundred four".