18901641 has 8 divisors (see below), whose sum is σ = 27493344. Its totient is φ = 11455520.

The previous prime is 18901613. The next prime is 18901651. The reversal of 18901641 is 14610981.

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 18901641 - 2⁶ = 18901577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18901599 and 18901608.

It is not an unprimeable number, because it can be changed into a prime (18901651) 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, 286356 + ... + 286421.

It is an arithmetic number, because the mean of its divisors is an integer number (3436668).

Almost surely, 2^18901641 is an apocalyptic number.

18901641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18901641 is a deficient number, since it is larger than the sum of its proper divisors (8591703).

18901641 is a wasteful number, since it uses less digits than its factorization.

18901641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572791.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 18901641 is about 4347.6017526908. The cubic root of 18901641 is about 266.3789095614.

The spelling of 18901641 in words is "eighteen million, nine hundred one thousand, six hundred forty-one".