20401010449 has 2 divisors, whose sum is σ = 20401010450. Its totient is φ = 20401010448.

The previous prime is 20401010387. The next prime is 20401010453. The reversal of 20401010449 is 94401010402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20387556225 + 13454224 = 142785^2 + 3668^2 .

It is a cyclic number.

It is not a de Polignac number, because 20401010449 - 2¹⁷ = 20400879377 is a prime.

It is not a weakly prime, because it can be changed into another prime (20401010459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200505224 + 10200505225.

It is an arithmetic number, because the mean of its divisors is an integer number (10200505225).

Almost surely, 2^20401010449 is an apocalyptic number.

It is an amenable number.

20401010449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20401010449 is an equidigital number, since it uses as much as digits as its factorization.

20401010449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 20401010449 in words is "twenty billion, four hundred one million, ten thousand, four hundred forty-nine".