19662116 has 12 divisors (see below), whose sum is σ = 35595420. Its totient is φ = 9492000.

The previous prime is 19662107. The next prime is 19662127. The reversal of 19662116 is 61126691.

It can be written as a sum of positive squares in 2 ways, for example, as 14092516 + 5569600 = 3754^2 + 2360^2 .

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, 84635 + ... + 84866.

It is an arithmetic number, because the mean of its divisors is an integer number (2966285).

Almost surely, 2^19662116 is an apocalyptic number.

It is an amenable number.

19662116 is a deficient number, since it is larger than the sum of its proper divisors (15933304).

19662116 is a wasteful number, since it uses less digits than its factorization.

19662116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169534 (or 169532 counting only the distinct ones).

The product of its digits is 3888, while the sum is 32.

The square root of 19662116 is about 4434.1984619545. The cubic root of 19662116 is about 269.9044746664.

The spelling of 19662116 in words is "nineteen million, six hundred sixty-two thousand, one hundred sixteen".