20331008 has 20 divisors (see below), whose sum is σ = 40623330. Its totient is φ = 10165248.

The previous prime is 20330993. The next prime is 20331023. The reversal of 20331008 is 80013302.

It is an interprime number because it is at equal distance from previous prime (20330993) and next prime (20331023).

It can be written as a sum of positive squares in only one way, i.e., 13191424 + 7139584 = 3632^2 + 2672^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19343 + ... + 20366.

Almost surely, 2^20331008 is an apocalyptic number.

It is an amenable number.

20331008 is a deficient number, since it is larger than the sum of its proper divisors (20292322).

20331008 is an frugal number, since it uses more digits than its factorization.

20331008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39727 (or 39711 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 20331008 is about 4508.9919050715. The cubic root of 20331008 is about 272.9310653502.

The spelling of 20331008 in words is "twenty million, three hundred thirty-one thousand, eight".