20515303101 has 32 divisors (see below), whose sum is σ = 28682035200. Its totient is φ = 13027291200.

The previous prime is 20515303093. The next prime is 20515303103. The reversal of 20515303101 is 10130351502.

It is not a de Polignac number, because 20515303101 - 2³ = 20515303093 is a prime.

It is a super-2 number, since 2×20515303101² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20515303103) 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, 4507575 + ... + 4512123.

It is an arithmetic number, because the mean of its divisors is an integer number (896313600).

Almost surely, 2^20515303101 is an apocalyptic number.

It is an amenable number.

20515303101 is a deficient number, since it is larger than the sum of its proper divisors (8166732099).

20515303101 is a wasteful number, since it uses less digits than its factorization.

20515303101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5337.

The product of its (nonzero) digits is 450, while the sum is 21.

Adding to 20515303101 its reverse (10130351502), we get a palindrome (30645654603).

The spelling of 20515303101 in words is "twenty billion, five hundred fifteen million, three hundred three thousand, one hundred one".