20344517002949 has 2 divisors, whose sum is σ = 20344517002950. Its totient is φ = 20344517002948.

The previous prime is 20344517002921. The next prime is 20344517002951. The reversal of 20344517002949 is 94920071544302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17622406389025 + 2722110613924 = 4197905^2 + 1649882^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20344517002949 is a prime.

It is a super-2 number, since 2×20344517002949² (a number of 27 digits) contains 22 as substring.

Together with 20344517002951, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20344517002897 and 20344517002906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20344517004949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172258501474 + 10172258501475.

It is an arithmetic number, because the mean of its divisors is an integer number (10172258501475).

Almost surely, 2^{20344517002949} is an apocalyptic number.

It is an amenable number.

20344517002949 is a deficient number, since it is larger than the sum of its proper divisors (1).

20344517002949 is an equidigital number, since it uses as much as digits as its factorization.

20344517002949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 20344517002949 in words is "twenty trillion, three hundred forty-four billion, five hundred seventeen million, two thousand, nine hundred forty-nine".