20404024349 has 2 divisors, whose sum is σ = 20404024350. Its totient is φ = 20404024348.

The previous prime is 20404024283. The next prime is 20404024351. The reversal of 20404024349 is 94342040402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12005584900 + 8398439449 = 109570^2 + 91643^2 .

It is a cyclic number.

It is not a de Polignac number, because 20404024349 - 2¹² = 20404020253 is a prime.

Together with 20404024351, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20404024369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10202012174 + 10202012175.

It is an arithmetic number, because the mean of its divisors is an integer number (10202012175).

Almost surely, 2^20404024349 is an apocalyptic number.

It is an amenable number.

20404024349 is a deficient number, since it is larger than the sum of its proper divisors (1).

20404024349 is an equidigital number, since it uses as much as digits as its factorization.

20404024349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 32.

The spelling of 20404024349 in words is "twenty billion, four hundred four million, twenty-four thousand, three hundred forty-nine".