17780242020 has 24 divisors (see below), whose sum is σ = 49784677824. Its totient is φ = 4741397856.

The previous prime is 17780242003. The next prime is 17780242033. The reversal of 17780242020 is 2024208771.

It is a super-2 number, since 2×17780242020² (a number of 21 digits) contains 22 as substring.

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, 148168624 + ... + 148168743.

It is an arithmetic number, because the mean of its divisors is an integer number (2074361576).

Almost surely, 2^17780242020 is an apocalyptic number.

17780242020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17780242020 is an abundant number, since it is smaller than the sum of its proper divisors (32004435804).

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

17780242020 is a wasteful number, since it uses less digits than its factorization.

17780242020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296337379 (or 296337377 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

The spelling of 17780242020 in words is "seventeen billion, seven hundred eighty million, two hundred forty-two thousand, twenty".