20423445404249 has 12 divisors (see below), whose sum is σ = 21876653746224. Its totient is φ = 19059743214072.

The previous prime is 20423445404231. The next prime is 20423445404267. The reversal of 20423445404249 is 94240454432402.

It is an interprime number because it is at equal distance from previous prime (20423445404231) and next prime (20423445404267).

It is not a de Polignac number, because 20423445404249 - 2¹⁶ = 20423445338713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20423445404269) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 422174627 + ... + 422223000.

It is an arithmetic number, because the mean of its divisors is an integer number (1823054478852).

Almost surely, 2^{20423445404249} is an apocalyptic number.

It is an amenable number.

20423445404249 is a deficient number, since it is larger than the sum of its proper divisors (1453208341975).

20423445404249 is an equidigital number, since it uses as much as digits as its factorization.

20423445404249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844397732 (or 844397713 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 47.

The spelling of 20423445404249 in words is "twenty trillion, four hundred twenty-three billion, four hundred forty-five million, four hundred four thousand, two hundred forty-nine".