20152255450399 has 4 divisors (see below), whose sum is σ = 20227170898440. Its totient is φ = 20077340002360.

The previous prime is 20152255450343. The next prime is 20152255450403. The reversal of 20152255450399 is 99305455225102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20152255450399 is a prime.

It is a super-2 number, since 2×20152255450399² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20152255450309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37457723617 + ... + 37457724154.

It is an arithmetic number, because the mean of its divisors is an integer number (5056792724610).

Almost surely, 2^{20152255450399} is an apocalyptic number.

20152255450399 is a deficient number, since it is larger than the sum of its proper divisors (74915448041).

20152255450399 is an equidigital number, since it uses as much as digits as its factorization.

20152255450399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74915448040.

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 20152255450399 in words is "twenty trillion, one hundred fifty-two billion, two hundred fifty-five million, four hundred fifty thousand, three hundred ninety-nine".