21414432031 has 2 divisors, whose sum is σ = 21414432032. Its totient is φ = 21414432030.

The previous prime is 21414432023. The next prime is 21414432071. The reversal of 21414432031 is 13023441412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21414432031 - 2³ = 21414432023 is a prime.

It is a super-2 number, since 2×21414432031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21414431987 and 21414432005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21414432001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10707216015 + 10707216016.

It is an arithmetic number, because the mean of its divisors is an integer number (10707216016).

Almost surely, 2^21414432031 is an apocalyptic number.

21414432031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21414432031 is an equidigital number, since it uses as much as digits as its factorization.

21414432031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21414432031 its reverse (13023441412), we get a palindrome (34437873443).

The spelling of 21414432031 in words is "twenty-one billion, four hundred fourteen million, four hundred thirty-two thousand, thirty-one".