17420378850 has 288 divisors, whose sum is σ = 55386205056. Its totient is φ = 3842380800.

The previous prime is 17420378837. The next prime is 17420378863. The reversal of 17420378850 is 5887302471.

It is an interprime number because it is at equal distance from previous prime (17420378837) and next prime (17420378863).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 17420378796 and 17420378805.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 15966805 + ... + 15967895.

It is an arithmetic number, because the mean of its divisors is an integer number (192313212).

Almost surely, 2^17420378850 is an apocalyptic number.

17420378850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 17420378850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27693102528).

17420378850 is an abundant number, since it is smaller than the sum of its proper divisors (37965826206).

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

17420378850 is a wasteful number, since it uses less digits than its factorization.

17420378850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290 (or 1282 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 17420378850 in words is "seventeen billion, four hundred twenty million, three hundred seventy-eight thousand, eight hundred fifty".