1920011001 has 4 divisors (see below), whose sum is σ = 2560014672. Its totient is φ = 1280007332.

The previous prime is 1920010999. The next prime is 1920011011. The reversal of 1920011001 is 1001100291.

1920011001 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1920011001 - 2¹ = 1920010999 is a prime.

It is a super-2 number, since 2×1920011001² = 7372884487922044002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1920011011) 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, 320001831 + ... + 320001836.

It is an arithmetic number, because the mean of its divisors is an integer number (640003668).

Almost surely, 2^1920011001 is an apocalyptic number.

It is an amenable number.

1920011001 is a deficient number, since it is larger than the sum of its proper divisors (640003671).

1920011001 is an equidigital number, since it uses as much as digits as its factorization.

1920011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640003670.

The product of its (nonzero) digits is 18, while the sum is 15.

The square root of 1920011001 is about 43817.9301313971. The cubic root of 1920011001 is about 1242.8953761732.

Adding to 1920011001 its reverse (1001100291), we get a palindrome (2921111292).

The spelling of 1920011001 in words is "one billion, nine hundred twenty million, eleven thousand, one".