181920201001 has 8 divisors (see below), whose sum is σ = 226809601344. Its totient is φ = 141756000720.

The previous prime is 181920200989. The next prime is 181920201041. The reversal of 181920201001 is 100102029181.

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 181920201001 - 2¹⁵ = 181920168233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181920201041) 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, 1181299930 + ... + 1181300083.

It is an arithmetic number, because the mean of its divisors is an integer number (28351200168).

Almost surely, 2^181920201001 is an apocalyptic number.

181920201001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

181920201001 is a deficient number, since it is larger than the sum of its proper divisors (44889400343).

181920201001 is a wasteful number, since it uses less digits than its factorization.

181920201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362600031.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 181920201001 in words is "one hundred eighty-one billion, nine hundred twenty million, two hundred one thousand, one".