19906572466 has 8 divisors (see below), whose sum is σ = 32574391344. Its totient is φ = 9048442020.

The previous prime is 19906572461. The next prime is 19906572481. The reversal of 19906572466 is 66427560991.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (19906572461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452422080 + ... + 452422123.

It is an arithmetic number, because the mean of its divisors is an integer number (4071798918).

Almost surely, 2^19906572466 is an apocalyptic number.

19906572466 is a deficient number, since it is larger than the sum of its proper divisors (12667818878).

19906572466 is a wasteful number, since it uses less digits than its factorization.

19906572466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904844216.

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 19906572466 in words is "nineteen billion, nine hundred six million, five hundred seventy-two thousand, four hundred sixty-six".