1900190919001 has 4 divisors (see below), whose sum is σ = 1901337686452. Its totient is φ = 1899044151552.

The previous prime is 1900190918933. The next prime is 1900190919007. The reversal of 1900190919001 is 1009190910091.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 863368038976 + 1036822880025 = 929176^2 + 1018245^2 .

It is a cyclic number.

It is not a de Polignac number, because 1900190919001 - 2¹⁵ = 1900190886233 is a prime.

It is a super-2 number, since 2×1900190919001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1900190919007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573381240 + ... + 573384553.

It is an arithmetic number, because the mean of its divisors is an integer number (475334421613).

Almost surely, 2^{1900190919001} is an apocalyptic number.

It is an amenable number.

1900190919001 is a deficient number, since it is larger than the sum of its proper divisors (1146767451).

1900190919001 is a wasteful number, since it uses less digits than its factorization.

1900190919001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146767450.

The product of its (nonzero) digits is 6561, while the sum is 40.

The spelling of 1900190919001 in words is "one trillion, nine hundred billion, one hundred ninety million, nine hundred nineteen thousand, one".