20261886 has 8 divisors (see below), whose sum is σ = 40523784. Its totient is φ = 6753960.

The previous prime is 20261881. The next prime is 20261897. The reversal of 20261886 is 68816202.

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

20261886 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20261881) 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, 1688485 + ... + 1688496.

It is an arithmetic number, because the mean of its divisors is an integer number (5065473).

Almost surely, 2^20261886 is an apocalyptic number.

20261886 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20261886 is a wasteful number, since it uses less digits than its factorization.

20261886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3376986.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 20261886 is about 4501.3204729279. The cubic root of 20261886 is about 272.6214076185.

The spelling of 20261886 in words is "twenty million, two hundred sixty-one thousand, eight hundred eighty-six".