19201010945 has 8 divisors (see below), whose sum is σ = 23042573736. Its totient is φ = 15359901696.

The previous prime is 19201010897. The next prime is 19201010947. The reversal of 19201010945 is 54901010291.

It can be written as a sum of positive squares in 4 ways, for example, as 663371536 + 18537639409 = 25756^2 + 136153^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19201010945 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19201010947) 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, 12002 + ... + 196331.

It is an arithmetic number, because the mean of its divisors is an integer number (2880321717).

Almost surely, 2^19201010945 is an apocalyptic number.

It is an amenable number.

19201010945 is a deficient number, since it is larger than the sum of its proper divisors (3841562791).

19201010945 is a wasteful number, since it uses less digits than its factorization.

19201010945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226771.

The product of its (nonzero) digits is 3240, while the sum is 32.

The spelling of 19201010945 in words is "nineteen billion, two hundred one million, ten thousand, nine hundred forty-five".