21411432379 has 2 divisors, whose sum is σ = 21411432380. Its totient is φ = 21411432378.

The previous prime is 21411432353. The next prime is 21411432433. The reversal of 21411432379 is 97323411412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21411432379 - 2¹⁹ = 21410908091 is a prime.

It is not a weakly prime, because it can be changed into another prime (21411432319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10705716189 + 10705716190.

It is an arithmetic number, because the mean of its divisors is an integer number (10705716190).

Almost surely, 2^21411432379 is an apocalyptic number.

21411432379 is a deficient number, since it is larger than the sum of its proper divisors (1).

21411432379 is an equidigital number, since it uses as much as digits as its factorization.

21411432379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The spelling of 21411432379 in words is "twenty-one billion, four hundred eleven million, four hundred thirty-two thousand, three hundred seventy-nine".