168705020 has 48 divisors (see below), whose sum is σ = 387380448. Its totient is φ = 61205760.

The previous prime is 168705011. The next prime is 168705029. The reversal of 168705020 is 20507861.

It is an interprime number because it is at equal distance from previous prime (168705011) and next prime (168705029).

It is a super-2 number, since 2×168705020² = 56922767546400800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168705029) 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, 166034 + ... + 167046.

It is an arithmetic number, because the mean of its divisors is an integer number (8070426).

Almost surely, 2^168705020 is an apocalyptic number.

168705020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168705020 is an abundant number, since it is smaller than the sum of its proper divisors (218675428).

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

168705020 is a wasteful number, since it uses less digits than its factorization.

168705020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790 (or 1788 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 168705020 is about 12988.6496603766. The cubic root of 168705020 is about 552.5556218443. Note that the first 3 decimals are identical.

The spelling of 168705020 in words is "one hundred sixty-eight million, seven hundred five thousand, twenty".