19881054 has 24 divisors (see below), whose sum is σ = 43263792. Its totient is φ = 6598080.

The previous prime is 19881019. The next prime is 19881077. The reversal of 19881054 is 45018891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2047 + ... + 6629.

It is an arithmetic number, because the mean of its divisors is an integer number (1802658).

Almost surely, 2^19881054 is an apocalyptic number.

19881054 is an abundant number, since it is smaller than the sum of its proper divisors (23382738).

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

19881054 is a wasteful number, since it uses less digits than its factorization.

19881054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4832 (or 4829 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 19881054 is about 4458.8175562586. The cubic root of 19881054 is about 270.9025761469.

The spelling of 19881054 in words is "nineteen million, eight hundred eighty-one thousand, fifty-four".