19962666 has 32 divisors (see below), whose sum is σ = 46293120. Its totient is φ = 6364512.

The previous prime is 19962661. The next prime is 19962713. The reversal of 19962666 is 66626991.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (19962661) 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, 6795 + ... + 9278.

It is an arithmetic number, because the mean of its divisors is an integer number (1446660).

Almost surely, 2^19962666 is an apocalyptic number.

19962666 is an abundant number, since it is smaller than the sum of its proper divisors (26330454).

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

19962666 is a wasteful number, since it uses less digits than its factorization.

19962666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16107 (or 16101 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 19962666 is about 4467.9599371525. The cubic root of 19962666 is about 271.2727563429.

The spelling of 19962666 in words is "nineteen million, nine hundred sixty-two thousand, six hundred sixty-six".