20876870 has 32 divisors (see below), whose sum is σ = 44817408. Its totient is φ = 6846048.

The previous prime is 20876861. The next prime is 20876899. The reversal of 20876870 is 7867802.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4874 + ... + 8093.

It is an arithmetic number, because the mean of its divisors is an integer number (1400544).

Almost surely, 2^20876870 is an apocalyptic number.

20876870 is an abundant number, since it is smaller than the sum of its proper divisors (23940538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20876870 is a wasteful number, since it uses less digits than its factorization.

20876870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13004.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 20876870 is about 4569.1213597365. The cubic root of 20876870 is about 275.3521439203.

The spelling of 20876870 in words is "twenty million, eight hundred seventy-six thousand, eight hundred seventy".