20861883 has 12 divisors (see below), whose sum is σ = 34438768. Its totient is φ = 11921040.

The previous prime is 20861833. The next prime is 20861891. The reversal of 20861883 is 38816802.

It is not a de Polignac number, because 20861883 - 2⁹ = 20861371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20861803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165508 + ... + 165633.

Almost surely, 2^20861883 is an apocalyptic number.

20861883 is a deficient number, since it is larger than the sum of its proper divisors (13576885).

20861883 is a wasteful number, since it uses less digits than its factorization.

20861883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331154 (or 331151 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 20861883 is about 4567.4810344434. The cubic root of 20861883 is about 275.2862385993.

It can be divided in two parts, 2086 and 1883, that added together give a square (3969 = 63²).

The spelling of 20861883 in words is "twenty million, eight hundred sixty-one thousand, eight hundred eighty-three".