19433728541 has 2 divisors, whose sum is σ = 19433728542. Its totient is φ = 19433728540.

The previous prime is 19433728529. The next prime is 19433728547. The reversal of 19433728541 is 14582733491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13094224900 + 6339503641 = 114430^2 + 79621^2 .

It is a cyclic number.

It is not a de Polignac number, because 19433728541 - 2²² = 19429534237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19433728547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9716864270 + 9716864271.

It is an arithmetic number, because the mean of its divisors is an integer number (9716864271).

Almost surely, 2^19433728541 is an apocalyptic number.

It is an amenable number.

19433728541 is a deficient number, since it is larger than the sum of its proper divisors (1).

19433728541 is an equidigital number, since it uses as much as digits as its factorization.

19433728541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The spelling of 19433728541 in words is "nineteen billion, four hundred thirty-three million, seven hundred twenty-eight thousand, five hundred forty-one".