19473637541 has 2 divisors, whose sum is σ = 19473637542. Its totient is φ = 19473637540.

The previous prime is 19473637483. The next prime is 19473637543. The reversal of 19473637541 is 14573637491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19425390625 + 48246916 = 139375^2 + 6946^2 .

It is a cyclic number.

It is not a de Polignac number, because 19473637541 - 2²⁶ = 19406528677 is a prime.

Together with 19473637543, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19473637541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19473637543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9736818770 + 9736818771.

It is an arithmetic number, because the mean of its divisors is an integer number (9736818771).

Almost surely, 2^19473637541 is an apocalyptic number.

It is an amenable number.

19473637541 is a deficient number, since it is larger than the sum of its proper divisors (1).

19473637541 is an equidigital number, since it uses as much as digits as its factorization.

19473637541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 50.

Subtracting from 19473637541 its sum of digits (50), we obtain a palindrome (19473637491).

The spelling of 19473637541 in words is "nineteen billion, four hundred seventy-three million, six hundred thirty-seven thousand, five hundred forty-one".