20449154482087 has 4 divisors (see below), whose sum is σ = 21154297740120. Its totient is φ = 19744011224056.

The previous prime is 20449154482067. The next prime is 20449154482103. The reversal of 20449154482087 is 78028445194402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20449154482087 - 2¹¹ = 20449154480039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20449154482007) 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, 352571628973 + ... + 352571629030.

It is an arithmetic number, because the mean of its divisors is an integer number (5288574435030).

Almost surely, 2^{20449154482087} is an apocalyptic number.

20449154482087 is a deficient number, since it is larger than the sum of its proper divisors (705143258033).

20449154482087 is an equidigital number, since it uses as much as digits as its factorization.

20449154482087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705143258032.

The product of its (nonzero) digits is 20643840, while the sum is 58.

The spelling of 20449154482087 in words is "twenty trillion, four hundred forty-nine billion, one hundred fifty-four million, four hundred eighty-two thousand, eighty-seven".