20881419 has 16 divisors (see below), whose sum is σ = 30089472. Its totient is φ = 12804768.

The previous prime is 20881381. The next prime is 20881433. The reversal of 20881419 is 91418802.

It is not a de Polignac number, because 20881419 - 2⁸ = 20881163 is a prime.

It is a super-2 number, since 2×20881419² = 872067318907122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20881419.

It is not an unprimeable number, because it can be changed into a prime (20881439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12762 + ... + 14304.

It is an arithmetic number, because the mean of its divisors is an integer number (1880592).

Almost surely, 2^20881419 is an apocalyptic number.

20881419 is a deficient number, since it is larger than the sum of its proper divisors (9208053).

20881419 is a wasteful number, since it uses less digits than its factorization.

20881419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 20881419 is about 4569.6191307373. The cubic root of 20881419 is about 275.3721419043.

The spelling of 20881419 in words is "twenty million, eight hundred eighty-one thousand, four hundred nineteen".