42434432000021 has 2 divisors, whose sum is σ = 42434432000022. Its totient is φ = 42434432000020.

The previous prime is 42434431999937. The next prime is 42434432000083. The reversal of 42434432000021 is 12000023443424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33769592167921 + 8664839832100 = 5811161^2 + 2943610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42434432000021 is a prime.

It is a super-2 number, since 2×42434432000021² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42434432000621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21217216000010 + 21217216000011.

It is an arithmetic number, because the mean of its divisors is an integer number (21217216000011).

Almost surely, 2^{42434432000021} is an apocalyptic number.

It is an amenable number.

42434432000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

42434432000021 is an equidigital number, since it uses as much as digits as its factorization.

42434432000021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 42434432000021 its reverse (12000023443424), we get a palindrome (54434455443445).

The spelling of 42434432000021 in words is "forty-two trillion, four hundred thirty-four billion, four hundred thirty-two million, twenty-one", and thus it is an aban number.