19472081 has 4 divisors (see below), whose sum is σ = 19520100. Its totient is φ = 19424064.

The previous prime is 19472059. The next prime is 19472083. The reversal of 19472081 is 18027491.

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 14592400 + 4879681 = 3820^2 + 2209^2 .

It is a cyclic number.

It is not a de Polignac number, because 19472081 - 2¹⁰ = 19471057 is a prime.

It is a super-2 number, since 2×19472081² = 758323876941122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19472083) 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, 23396 + ... + 24213.

It is an arithmetic number, because the mean of its divisors is an integer number (4880025).

Almost surely, 2^19472081 is an apocalyptic number.

It is an amenable number.

19472081 is a deficient number, since it is larger than the sum of its proper divisors (48019).

19472081 is an equidigital number, since it uses as much as digits as its factorization.

19472081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48018.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 19472081 is about 4412.7180965931. The cubic root of 19472081 is about 269.0321129142.

The spelling of 19472081 in words is "nineteen million, four hundred seventy-two thousand, eighty-one".