20154300505 has 32 divisors (see below), whose sum is σ = 25913260800. Its totient is φ = 15010744320.

The previous prime is 20154300503. The next prime is 20154300533. The reversal of 20154300505 is 50500345102.

It is not a de Polignac number, because 20154300505 - 2¹ = 20154300503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20154300505.

It is not an unprimeable number, because it can be changed into a prime (20154300503) 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, 2083921 + ... + 2093569.

It is an arithmetic number, because the mean of its divisors is an integer number (809789400).

Almost surely, 2^20154300505 is an apocalyptic number.

It is an amenable number.

20154300505 is a deficient number, since it is larger than the sum of its proper divisors (5758960295).

20154300505 is a wasteful number, since it uses less digits than its factorization.

20154300505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10161.

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 20154300505 its reverse (50500345102), we get a palindrome (70654645607).

The spelling of 20154300505 in words is "twenty billion, one hundred fifty-four million, three hundred thousand, five hundred five".