20345140513 has 8 divisors (see below), whose sum is σ = 20469024000. Its totient is φ = 20221473888.

The previous prime is 20345140493. The next prime is 20345140553. The reversal of 20345140513 is 31504154302.

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

It is a cyclic number.

It is not a de Polignac number, because 20345140513 - 2²⁹ = 19808269601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20345140553) 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, 136008 + ... + 243286.

It is an arithmetic number, because the mean of its divisors is an integer number (2558628000).

Almost surely, 2^20345140513 is an apocalyptic number.

It is an amenable number.

20345140513 is a deficient number, since it is larger than the sum of its proper divisors (123883487).

20345140513 is a wasteful number, since it uses less digits than its factorization.

20345140513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108431.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 20345140513 its reverse (31504154302), we get a palindrome (51849294815).

The spelling of 20345140513 in words is "twenty billion, three hundred forty-five million, one hundred forty thousand, five hundred thirteen".