20413343989 has 2 divisors, whose sum is σ = 20413343990. Its totient is φ = 20413343988.

The previous prime is 20413343987. The next prime is 20413344047. The reversal of 20413343989 is 98934331402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19890307089 + 523036900 = 141033^2 + 22870^2 .

It is a cyclic number.

It is not a de Polignac number, because 20413343989 - 2¹ = 20413343987 is a prime.

It is a super-2 number, since 2×20413343989² (a number of 21 digits) contains 22 as substring.

Together with 20413343987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20413343987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206671994 + 10206671995.

It is an arithmetic number, because the mean of its divisors is an integer number (10206671995).

Almost surely, 2^20413343989 is an apocalyptic number.

It is an amenable number.

20413343989 is a deficient number, since it is larger than the sum of its proper divisors (1).

20413343989 is an equidigital number, since it uses as much as digits as its factorization.

20413343989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 46.

The spelling of 20413343989 in words is "twenty billion, four hundred thirteen million, three hundred forty-three thousand, nine hundred eighty-nine".