20193001901 has 4 divisors (see below), whose sum is σ = 20448609600. Its totient is φ = 19937394204.

The previous prime is 20193001891. The next prime is 20193001903. The reversal of 20193001901 is 10910039102.

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 a de Polignac number, because none of the positive numbers 2^k-20193001901 is a prime.

It is a super-3 number, since 3×20193001901³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20193001903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127803731 + ... + 127803888.

It is an arithmetic number, because the mean of its divisors is an integer number (5112152400).

Almost surely, 2^20193001901 is an apocalyptic number.

It is an amenable number.

20193001901 is a deficient number, since it is larger than the sum of its proper divisors (255607699).

20193001901 is an equidigital number, since it uses as much as digits as its factorization.

20193001901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255607698.

The product of its (nonzero) digits is 486, while the sum is 26.

The spelling of 20193001901 in words is "twenty billion, one hundred ninety-three million, one thousand, nine hundred one".