20256886 has 8 divisors (see below), whose sum is σ = 32722704. Its totient is φ = 9349320.

The previous prime is 20256853. The next prime is 20256889. The reversal of 20256886 is 68865202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20256889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389530 + ... + 389581.

It is an arithmetic number, because the mean of its divisors is an integer number (4090338).

Almost surely, 2^20256886 is an apocalyptic number.

20256886 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20256886 is a deficient number, since it is larger than the sum of its proper divisors (12465818).

20256886 is a wasteful number, since it uses less digits than its factorization.

20256886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779126.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 20256886 is about 4500.7650460783. The cubic root of 20256886 is about 272.5989809603.

It can be divided in two parts, 2025 and 6886, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 20256886 in words is "twenty million, two hundred fifty-six thousand, eight hundred eighty-six".