19656966 has 32 divisors (see below), whose sum is σ = 45077760. Its totient is φ = 5597856.

The previous prime is 19656961. The next prime is 19656979. The reversal of 19656966 is 66965691.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19656961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17040 + ... + 18156.

It is an arithmetic number, because the mean of its divisors is an integer number (1408680).

Almost surely, 2^19656966 is an apocalyptic number.

19656966 is an abundant number, since it is smaller than the sum of its proper divisors (25420794).

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

19656966 is a wasteful number, since it uses less digits than its factorization.

19656966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548.

The product of its digits is 524880, while the sum is 48.

The square root of 19656966 is about 4433.6177101775. The cubic root of 19656966 is about 269.8809076977.

The spelling of 19656966 in words is "nineteen million, six hundred fifty-six thousand, nine hundred sixty-six".