420203340022451 has 4 divisors (see below), whose sum is σ = 420203834064504. Its totient is φ = 420202845980400.

The previous prime is 420203340022259. The next prime is 420203340022483. The reversal of 420203340022451 is 154220043302024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420203340022451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420203340082451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245743010 + ... + 247447031.

It is an arithmetic number, because the mean of its divisors is an integer number (105050958516126).

Almost surely, 2^{420203340022451} is an apocalyptic number.

420203340022451 is a deficient number, since it is larger than the sum of its proper divisors (494042053).

420203340022451 is an equidigital number, since it uses as much as digits as its factorization.

420203340022451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494042052.

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 420203340022451 its reverse (154220043302024), we get a palindrome (574423383324475).

The spelling of 420203340022451 in words is "four hundred twenty trillion, two hundred three billion, three hundred forty million, twenty-two thousand, four hundred fifty-one".