17256879420 has 48 divisors (see below), whose sum is σ = 52711924608. Its totient is φ = 4183485760.

The previous prime is 17256879407. The next prime is 17256879421. The reversal of 17256879420 is 2497865271.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17256879421) 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, 13072734 + ... + 13074053.

It is an arithmetic number, because the mean of its divisors is an integer number (1098165096).

Almost surely, 2^17256879420 is an apocalyptic number.

17256879420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17256879420 is an abundant number, since it is smaller than the sum of its proper divisors (35455045188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17256879420 is a wasteful number, since it uses less digits than its factorization.

17256879420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26146810 (or 26146808 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 17256879420 in words is "seventeen billion, two hundred fifty-six million, eight hundred seventy-nine thousand, four hundred twenty".