20019147 has 8 divisors (see below), whose sum is σ = 26803920. Its totient is φ = 13290240.

The previous prime is 20019121. The next prime is 20019157. The reversal of 20019147 is 74191002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20019147 - 2⁸ = 20018891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20019157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13122 + ... + 14567.

It is an arithmetic number, because the mean of its divisors is an integer number (3350490).

Almost surely, 2^20019147 is an apocalyptic number.

20019147 is a deficient number, since it is larger than the sum of its proper divisors (6784773).

20019147 is a wasteful number, since it uses less digits than its factorization.

20019147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27933.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 20019147 is about 4474.2761425732. The cubic root of 20019147 is about 271.5283556220.

The spelling of 20019147 in words is "twenty million, nineteen thousand, one hundred forty-seven".