20147180 has 12 divisors (see below), whose sum is σ = 42309120. Its totient is φ = 8058864.

The previous prime is 20147147. The next prime is 20147189. The reversal of 20147180 is 8174102.

It is not an unprimeable number, because it can be changed into a prime (20147189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503660 + ... + 503699.

It is an arithmetic number, because the mean of its divisors is an integer number (3525760).

Almost surely, 2^20147180 is an apocalyptic number.

20147180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20147180 is an abundant number, since it is smaller than the sum of its proper divisors (22161940).

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

20147180 is a wasteful number, since it uses less digits than its factorization.

20147180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007368 (or 1007366 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 20147180 is about 4488.5610166288. The cubic root of 20147180 is about 272.1059816240.

The spelling of 20147180 in words is "twenty million, one hundred forty-seven thousand, one hundred eighty".