19661402 has 8 divisors (see below), whose sum is σ = 29632512. Its totient is φ = 9783900.

The previous prime is 19661387. The next prime is 19661417. The reversal of 19661402 is 20416691.

It is an interprime number because it is at equal distance from previous prime (19661387) and next prime (19661417).

It is a sphenic number, since it is the product of 3 distinct primes.

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, 22874 + ... + 23717.

It is an arithmetic number, because the mean of its divisors is an integer number (3704064).

Almost surely, 2^19661402 is an apocalyptic number.

19661402 is a deficient number, since it is larger than the sum of its proper divisors (9971110).

19661402 is a wasteful number, since it uses less digits than its factorization.

19661402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46804.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 19661402 is about 4434.1179506188. The cubic root of 19661402 is about 269.9012075693.

The spelling of 19661402 in words is "nineteen million, six hundred sixty-one thousand, four hundred two".