20201454397 has 2 divisors, whose sum is σ = 20201454398. Its totient is φ = 20201454396.

The previous prime is 20201454391. The next prime is 20201454463. The reversal of 20201454397 is 79345410202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17426904121 + 2774550276 = 132011^2 + 52674^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201454397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201454391) 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, 10100727198 + 10100727199.

It is an arithmetic number, because the mean of its divisors is an integer number (10100727199).

Almost surely, 2^20201454397 is an apocalyptic number.

It is an amenable number.

20201454397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201454397 is an equidigital number, since it uses as much as digits as its factorization.

20201454397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

Adding to 20201454397 its reverse (79345410202), we get a palindrome (99546864599).

The spelling of 20201454397 in words is "twenty billion, two hundred one million, four hundred fifty-four thousand, three hundred ninety-seven".