32340400021 has 2 divisors, whose sum is σ = 32340400022. Its totient is φ = 32340400020.

The previous prime is 32340399989. The next prime is 32340400039. The reversal of 32340400021 is 12000404323.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29878851025 + 2461548996 = 172855^2 + 49614^2 .

It is an emirp because it is prime and its reverse (12000404323) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32340400021 - 2⁵ = 32340399989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32340400051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16170200010 + 16170200011.

It is an arithmetic number, because the mean of its divisors is an integer number (16170200011).

Almost surely, 2^32340400021 is an apocalyptic number.

It is an amenable number.

32340400021 is a deficient number, since it is larger than the sum of its proper divisors (1).

32340400021 is an equidigital number, since it uses as much as digits as its factorization.

32340400021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 32340400021 its reverse (12000404323), we get a palindrome (44340804344).

The spelling of 32340400021 in words is "thirty-two billion, three hundred forty million, four hundred thousand, twenty-one".