20870008 has 8 divisors (see below), whose sum is σ = 39131280. Its totient is φ = 10435000.

The previous prime is 20869987. The next prime is 20870023. The reversal of 20870008 is 80007802.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1304368 + ... + 1304383.

It is an arithmetic number, because the mean of its divisors is an integer number (4891410).

Almost surely, 2^20870008 is an apocalyptic number.

It is an amenable number.

20870008 is a deficient number, since it is larger than the sum of its proper divisors (18261272).

20870008 is a wasteful number, since it uses less digits than its factorization.

20870008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2608757 (or 2608753 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 20870008 is about 4568.3703877860. The cubic root of 20870008 is about 275.3219721966.

The spelling of 20870008 in words is "twenty million, eight hundred seventy thousand, eight".