21431410999 has 2 divisors, whose sum is σ = 21431411000. Its totient is φ = 21431410998.

The previous prime is 21431410963. The next prime is 21431411011. The reversal of 21431410999 is 99901413412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21431410999 - 2¹¹ = 21431408951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21431410199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10715705499 + 10715705500.

It is an arithmetic number, because the mean of its divisors is an integer number (10715705500).

Almost surely, 2^21431410999 is an apocalyptic number.

21431410999 is a deficient number, since it is larger than the sum of its proper divisors (1).

21431410999 is an equidigital number, since it uses as much as digits as its factorization.

21431410999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 43.

The spelling of 21431410999 in words is "twenty-one billion, four hundred thirty-one million, four hundred ten thousand, nine hundred ninety-nine".