20001000120949 has 2 divisors, whose sum is σ = 20001000120950. Its totient is φ = 20001000120948.

The previous prime is 20001000120923. The next prime is 20001000121019. The reversal of 20001000120949 is 94902100010002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19819858802500 + 181141318449 = 4451950^2 + 425607^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001000120949 - 2¹⁹ = 20000999596661 is a prime.

It is a super-3 number, since 3×20001000120949³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001000120149) 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, 10000500060474 + 10000500060475.

It is an arithmetic number, because the mean of its divisors is an integer number (10000500060475).

Almost surely, 2^{20001000120949} is an apocalyptic number.

It is an amenable number.

20001000120949 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001000120949 is an equidigital number, since it uses as much as digits as its factorization.

20001000120949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 20001000120949 in words is "twenty trillion, one billion, one hundred twenty thousand, nine hundred forty-nine".