20154324415 has 16 divisors (see below), whose sum is σ = 25614677088. Its totient is φ = 15170973696.

The previous prime is 20154324361. The next prime is 20154324419. The reversal of 20154324415 is 51442345102.

It is a cyclic number.

It is not a de Polignac number, because 20154324415 - 2¹¹ = 20154322367 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 (20154324419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310639 + ... + 369871.

It is an arithmetic number, because the mean of its divisors is an integer number (1600917318).

Almost surely, 2^20154324415 is an apocalyptic number.

20154324415 is a deficient number, since it is larger than the sum of its proper divisors (5460352673).

20154324415 is a wasteful number, since it uses less digits than its factorization.

20154324415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63258.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 20154324415 its reverse (51442345102), we get a palindrome (71596669517).

It can be divided in two parts, 20154 and 324415, that added together give a square (344569 = 587²).

The spelling of 20154324415 in words is "twenty billion, one hundred fifty-four million, three hundred twenty-four thousand, four hundred fifteen".