20450154363015 has 16 divisors (see below), whose sum is σ = 35237189056608. Its totient is φ = 10067768301696.

The previous prime is 20450154363007. The next prime is 20450154363031. The reversal of 20450154363015 is 51036345105402.

It is a happy number.

It is not a de Polignac number, because 20450154363015 - 2³ = 20450154363007 is a prime.

It is a super-3 number, since 3×20450154363015³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52436293044 + ... + 52436293433.

It is an arithmetic number, because the mean of its divisors is an integer number (2202324316038).

Almost surely, 2^{20450154363015} is an apocalyptic number.

20450154363015 is a deficient number, since it is larger than the sum of its proper divisors (14787034693593).

20450154363015 is a wasteful number, since it uses less digits than its factorization.

20450154363015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104872586498.

The product of its (nonzero) digits is 216000, while the sum is 39.

Adding to 20450154363015 its reverse (51036345105402), we get a palindrome (71486499468417).

The spelling of 20450154363015 in words is "twenty trillion, four hundred fifty billion, one hundred fifty-four million, three hundred sixty-three thousand, fifteen".