20261878 has 32 divisors (see below), whose sum is σ = 37691136. Its totient is φ = 7954848.

The previous prime is 20261869. The next prime is 20261881. The reversal of 20261878 is 87816202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29325 + ... + 30007.

It is an arithmetic number, because the mean of its divisors is an integer number (1177848).

Almost surely, 2^20261878 is an apocalyptic number.

20261878 is a deficient number, since it is larger than the sum of its proper divisors (17429258).

20261878 is a wasteful number, since it uses less digits than its factorization.

20261878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 20261878 is about 4501.3195842997. The cubic root of 20261878 is about 272.6213717388.

The spelling of 20261878 in words is "twenty million, two hundred sixty-one thousand, eight hundred seventy-eight".