20001513979 has 2 divisors, whose sum is σ = 20001513980. Its totient is φ = 20001513978.

The previous prime is 20001513967. The next prime is 20001514007. The reversal of 20001513979 is 97931510002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20001513979 - 2¹³ = 20001505787 is a prime.

It is a super-2 number, since 2×20001513979² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20001513929) 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, 10000756989 + 10000756990.

It is an arithmetic number, because the mean of its divisors is an integer number (10000756990).

Almost surely, 2^20001513979 is an apocalyptic number.

20001513979 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001513979 is an equidigital number, since it uses as much as digits as its factorization.

20001513979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17010, while the sum is 37.

The spelling of 20001513979 in words is "twenty billion, one million, five hundred thirteen thousand, nine hundred seventy-nine".