20301405289 has 9 divisors (see below), whose sum is σ = 22316490679. Its totient is φ = 18454398160.

The previous prime is 20301405263. The next prime is 20301405359. The reversal of 20301405289 is 98250410302.

The square root of 20301405289 is 142483.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1911875625 + 18389529664 = 43725^2 + 135608^2 .

It is not a de Polignac number, because 20301405289 - 2⁷ = 20301405161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20301405689) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1560837 + ... + 1573789.

Almost surely, 2^20301405289 is an apocalyptic number.

20301405289 is the 142483-rd square number.

20301405289 is the 71242-nd centered octagonal number.

It is an amenable number.

20301405289 is a deficient number, since it is larger than the sum of its proper divisors (2015085390).

20301405289 is an frugal number, since it uses more digits than its factorization.

20301405289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25928 (or 12964 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 20301405289 in words is "twenty billion, three hundred one million, four hundred five thousand, two hundred eighty-nine".