20154434305 has 16 divisors (see below), whose sum is σ = 24288511104. Its totient is φ = 16054865280.

The previous prime is 20154434249. The next prime is 20154434327. The reversal of 20154434305 is 50343445102.

It is not a de Polignac number, because 20154434305 - 2¹⁵ = 20154401537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1600042 + ... + 1612588.

It is an arithmetic number, because the mean of its divisors is an integer number (1518031944).

Almost surely, 2^20154434305 is an apocalyptic number.

It is an amenable number.

20154434305 is a deficient number, since it is larger than the sum of its proper divisors (4134076799).

20154434305 is a wasteful number, since it uses less digits than its factorization.

20154434305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13896.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 20154434305 its reverse (50343445102), we get a palindrome (70497879407).

The spelling of 20154434305 in words is "twenty billion, one hundred fifty-four million, four hundred thirty-four thousand, three hundred five".