20005349497 has 8 divisors (see below), whose sum is σ = 22905058496. Its totient is φ = 17116090992.

The previous prime is 20005349479. The next prime is 20005349503. The reversal of 20005349497 is 79494350002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20005349497 - 2²⁷ = 19871131769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20005349407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2608518 + ... + 2616175.

It is an arithmetic number, because the mean of its divisors is an integer number (2863132312).

Almost surely, 2^20005349497 is an apocalyptic number.

It is an amenable number.

20005349497 is a deficient number, since it is larger than the sum of its proper divisors (2899708999).

20005349497 is an equidigital number, since it uses as much as digits as its factorization.

20005349497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5225247.

The product of its (nonzero) digits is 272160, while the sum is 43.

Adding to 20005349497 its reverse (79494350002), we get a palindrome (99499699499).

The spelling of 20005349497 in words is "twenty billion, five million, three hundred forty-nine thousand, four hundred ninety-seven".