20154663502449 has 32 divisors (see below), whose sum is σ = 30750434856960. Its totient is φ = 11502494595072.

The previous prime is 20154663502439. The next prime is 20154663502459. The reversal of 20154663502449 is 94420536645102.

It is an interprime number because it is at equal distance from previous prime (20154663502439) and next prime (20154663502459).

It is not a de Polignac number, because 20154663502449 - 2¹³ = 20154663494257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20154663502439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75294682 + ... + 75561884.

It is an arithmetic number, because the mean of its divisors is an integer number (960951089280).

Almost surely, 2^{20154663502449} is an apocalyptic number.

It is an amenable number.

20154663502449 is a deficient number, since it is larger than the sum of its proper divisors (10595771354511).

20154663502449 is a wasteful number, since it uses less digits than its factorization.

20154663502449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271709.

The product of its (nonzero) digits is 6220800, while the sum is 51.

The spelling of 20154663502449 in words is "twenty trillion, one hundred fifty-four billion, six hundred sixty-three million, five hundred two thousand, four hundred forty-nine".