21432825619 has 2 divisors, whose sum is σ = 21432825620. Its totient is φ = 21432825618.

The previous prime is 21432825611. The next prime is 21432825647. The reversal of 21432825619 is 91652823412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21432825619 - 2³ = 21432825611 is a prime.

It is a super-2 number, since 2×21432825619² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21432825611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716412809 + 10716412810.

It is an arithmetic number, because the mean of its divisors is an integer number (10716412810).

Almost surely, 2^21432825619 is an apocalyptic number.

21432825619 is a deficient number, since it is larger than the sum of its proper divisors (1).

21432825619 is an equidigital number, since it uses as much as digits as its factorization.

21432825619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 43.

The spelling of 21432825619 in words is "twenty-one billion, four hundred thirty-two million, eight hundred twenty-five thousand, six hundred nineteen".