15320020097 has 4 divisors (see below), whose sum is σ = 15529883460. Its totient is φ = 15110156736.

The previous prime is 15320020019. The next prime is 15320020117. The reversal of 15320020097 is 79002002351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79002002351 = 59 ⋅1339016989.

It can be written as a sum of positive squares in 2 ways, for example, as 2678166001 + 12641854096 = 51751^2 + 112436^2 .

It is a cyclic number.

It is not a de Polignac number, because 15320020097 - 2¹⁰ = 15320019073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15320020007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104931572 + ... + 104931717.

It is an arithmetic number, because the mean of its divisors is an integer number (3882470865).

Almost surely, 2^15320020097 is an apocalyptic number.

It is an amenable number.

15320020097 is a deficient number, since it is larger than the sum of its proper divisors (209863363).

15320020097 is an equidigital number, since it uses as much as digits as its factorization.

15320020097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209863362.

The product of its (nonzero) digits is 3780, while the sum is 29.

The spelling of 15320020097 in words is "fifteen billion, three hundred twenty million, twenty thousand, ninety-seven".