20115437097 has 32 divisors (see below), whose sum is σ = 31992226560. Its totient is φ = 11002567680.

The previous prime is 20115437059. The next prime is 20115437101. The reversal of 20115437097 is 79073451102.

It is not a de Polignac number, because 20115437097 - 2⁷ = 20115436969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20115432097) 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 31 ways as a sum of consecutive naturals, for example, 174772 + ... + 266037.

It is an arithmetic number, because the mean of its divisors is an integer number (999757080).

Almost surely, 2^20115437097 is an apocalyptic number.

It is an amenable number.

20115437097 is a deficient number, since it is larger than the sum of its proper divisors (11876789463).

20115437097 is a wasteful number, since it uses less digits than its factorization.

20115437097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440913.

The product of its (nonzero) digits is 52920, while the sum is 39.

Adding to 20115437097 its reverse (79073451102), we get a palindrome (99188888199).

The spelling of 20115437097 in words is "twenty billion, one hundred fifteen million, four hundred thirty-seven thousand, ninety-seven".