19481923066 has 16 divisors (see below), whose sum is σ = 29443852224. Its totient is φ = 9667342944.

The previous prime is 19481923003. The next prime is 19481923067. The reversal of 19481923066 is 66032918491.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19481923067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1484851 + ... + 1497913.

It is an arithmetic number, because the mean of its divisors is an integer number (1840240764).

Almost surely, 2^19481923066 is an apocalyptic number.

19481923066 is a deficient number, since it is larger than the sum of its proper divisors (9961929158).

19481923066 is a wasteful number, since it uses less digits than its factorization.

19481923066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18645.

The product of its (nonzero) digits is 559872, while the sum is 49.

The spelling of 19481923066 in words is "nineteen billion, four hundred eighty-one million, nine hundred twenty-three thousand, sixty-six".