20943817415 has 8 divisors (see below), whose sum is σ = 25745570928. Its totient is φ = 16346393920.

The previous prime is 20943817397. The next prime is 20943817423. The reversal of 20943817415 is 51471834902.

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

It is not a de Polignac number, because 20943817415 - 2⁸ = 20943817159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51082277 + ... + 51082686.

It is an arithmetic number, because the mean of its divisors is an integer number (3218196366).

Almost surely, 2^20943817415 is an apocalyptic number.

20943817415 is a deficient number, since it is larger than the sum of its proper divisors (4801753513).

20943817415 is a wasteful number, since it uses less digits than its factorization.

20943817415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102165009.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 20943817415 in words is "twenty billion, nine hundred forty-three million, eight hundred seventeen thousand, four hundred fifteen".