19855402 has 8 divisors (see below), whose sum is σ = 34037856. Its totient is φ = 8509452.

The previous prime is 19855391. The next prime is 19855427. The reversal of 19855402 is 20455891.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 709108 + ... + 709135.

It is an arithmetic number, because the mean of its divisors is an integer number (4254732).

Almost surely, 2^19855402 is an apocalyptic number.

19855402 is a deficient number, since it is larger than the sum of its proper divisors (14182454).

19855402 is a wasteful number, since it uses less digits than its factorization.

19855402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418252.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 19855402 is about 4455.9400803871. The cubic root of 19855402 is about 270.7860131817.

The spelling of 19855402 in words is "nineteen million, eight hundred fifty-five thousand, four hundred two".