20417893239 has 4 divisors (see below), whose sum is σ = 27223857656. Its totient is φ = 13611928824.

The previous prime is 20417893217. The next prime is 20417893241. The reversal of 20417893239 is 93239871402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20417893239 - 2⁸ = 20417892983 is a prime.

It is a super-2 number, since 2×20417893239² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20417892239) 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, 3402982204 + ... + 3402982209.

It is an arithmetic number, because the mean of its divisors is an integer number (6805964414).

Almost surely, 2^20417893239 is an apocalyptic number.

20417893239 is a deficient number, since it is larger than the sum of its proper divisors (6805964417).

20417893239 is an equidigital number, since it uses as much as digits as its factorization.

20417893239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6805964416.

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 20417893239 in words is "twenty billion, four hundred seventeen million, eight hundred ninety-three thousand, two hundred thirty-nine".