42020334451 has 2 divisors, whose sum is σ = 42020334452. Its totient is φ = 42020334450.

The previous prime is 42020334427. The next prime is 42020334463. The reversal of 42020334451 is 15443302024.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42020334451 - 2¹³ = 42020326259 is a prime.

It is not a weakly prime, because it can be changed into another prime (42020332451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21010167225 + 21010167226.

It is an arithmetic number, because the mean of its divisors is an integer number (21010167226).

Almost surely, 2^42020334451 is an apocalyptic number.

42020334451 is a deficient number, since it is larger than the sum of its proper divisors (1).

42020334451 is an equidigital number, since it uses as much as digits as its factorization.

42020334451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 42020334451 its reverse (15443302024), we get a palindrome (57463636475).

The spelling of 42020334451 in words is "forty-two billion, twenty million, three hundred thirty-four thousand, four hundred fifty-one".