20400024001449 has 4 divisors (see below), whose sum is σ = 27200032001936. Its totient is φ = 13600016000964.

The previous prime is 20400024001447. The next prime is 20400024001477. The reversal of 20400024001449 is 94410042000402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20400024001449 - 2¹ = 20400024001447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20400024001447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3400004000239 + ... + 3400004000244.

It is an arithmetic number, because the mean of its divisors is an integer number (6800008000484).

Almost surely, 2^{20400024001449} is an apocalyptic number.

It is an amenable number.

20400024001449 is a deficient number, since it is larger than the sum of its proper divisors (6800008000487).

20400024001449 is an equidigital number, since it uses as much as digits as its factorization.

20400024001449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6800008000486.

The product of its (nonzero) digits is 9216, while the sum is 30.

The spelling of 20400024001449 in words is "twenty trillion, four hundred billion, twenty-four million, one thousand, four hundred forty-nine".