19021996801 has 8 divisors (see below), whose sum is σ = 19112085000. Its totient is φ = 18932121600.

The previous prime is 19021996787. The next prime is 19021996823. The reversal of 19021996801 is 10869912091.

It can be written as a sum of positive squares in 4 ways, for example, as 13604889600 + 5417107201 = 116640^2 + 73601^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 19021996801 - 2¹⁷ = 19021865729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19021996841) 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, 127225 + ... + 232873.

It is an arithmetic number, because the mean of its divisors is an integer number (2389010625).

Almost surely, 2^19021996801 is an apocalyptic number.

It is an amenable number.

19021996801 is a deficient number, since it is larger than the sum of its proper divisors (90088199).

19021996801 is a wasteful number, since it uses less digits than its factorization.

19021996801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106499.

The product of its (nonzero) digits is 69984, while the sum is 46.

The spelling of 19021996801 in words is "nineteen billion, twenty-one million, nine hundred ninety-six thousand, eight hundred one".