19956066 has 16 divisors (see below), whose sum is σ = 42982464. Its totient is φ = 6140304.

The previous prime is 19956049. The next prime is 19956067. The reversal of 19956066 is 66065991.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19956067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127846 + ... + 128001.

It is an arithmetic number, because the mean of its divisors is an integer number (2686404).

Almost surely, 2^19956066 is an apocalyptic number.

19956066 is an abundant number, since it is smaller than the sum of its proper divisors (23026398).

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

19956066 is a wasteful number, since it uses less digits than its factorization.

19956066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255865.

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 19956066 is about 4467.2212839751. The cubic root of 19956066 is about 271.2428572379.

It can be divided in two parts, 199 and 56066, that added together give a palindrome (56265).

The spelling of 19956066 in words is "nineteen million, nine hundred fifty-six thousand, sixty-six".