20370018517 has 16 divisors (see below), whose sum is σ = 21921707520. Its totient is φ = 18878251392.

The previous prime is 20370018497. The next prime is 20370018601. The reversal of 20370018517 is 71581007302.

It is a cyclic number.

It is not a de Polignac number, because 20370018517 - 2¹⁵ = 20369985749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20370018917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153313 + ... + 253465.

It is an arithmetic number, because the mean of its divisors is an integer number (1370106720).

Almost surely, 2^20370018517 is an apocalyptic number.

It is an amenable number.

20370018517 is a deficient number, since it is larger than the sum of its proper divisors (1551689003).

20370018517 is a wasteful number, since it uses less digits than its factorization.

20370018517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100452.

The product of its (nonzero) digits is 11760, while the sum is 34.

The spelling of 20370018517 in words is "twenty billion, three hundred seventy million, eighteen thousand, five hundred seventeen".