161827020 has 72 divisors (see below), whose sum is σ = 500166576. Its totient is φ = 42337152.

The previous prime is 161827019. The next prime is 161827021. The reversal of 161827020 is 20728161.

161827020 is a `hidden beast` number, since 1 + 618 + 27 + 0 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (161827019) and next prime (161827021).

It is not an unprimeable number, because it can be changed into a prime (161827021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1059 + ... + 18021.

It is an arithmetic number, because the mean of its divisors is an integer number (6946758).

Almost surely, 2^161827020 is an apocalyptic number.

161827020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161827020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250083288).

161827020 is an abundant number, since it is smaller than the sum of its proper divisors (338339556).

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

161827020 is a wasteful number, since it uses less digits than its factorization.

161827020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17031 (or 17026 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 161827020 is about 12721.1249502550. The cubic root of 161827020 is about 544.9420806502.

The spelling of 161827020 in words is "one hundred sixty-one million, eight hundred twenty-seven thousand, twenty".