19955516 has 12 divisors (see below), whose sum is σ = 39911088. Its totient is φ = 8552352.

The previous prime is 19955497. The next prime is 19955539. The reversal of 19955516 is 61555991.

19955516 is an admirable number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356321 + ... + 356376.

It is an arithmetic number, because the mean of its divisors is an integer number (3325924).

Almost surely, 2^19955516 is an apocalyptic number.

It is an amenable number.

19955516 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.

19955516 is a wasteful number, since it uses less digits than its factorization.

19955516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712708 (or 712706 counting only the distinct ones).

The product of its digits is 60750, while the sum is 41.

The square root of 19955516 is about 4467.1597240305. The cubic root of 19955516 is about 271.2403653483.

The spelling of 19955516 in words is "nineteen million, nine hundred fifty-five thousand, five hundred sixteen".