20147290 has 8 divisors (see below), whose sum is σ = 36265140. Its totient is φ = 8058912.

The previous prime is 20147273. The next prime is 20147297. The reversal of 20147290 is 9274102.

It can be written as a sum of positive squares in 2 ways, for example, as 20061441 + 85849 = 4479^2 + 293^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20147297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1007355 + ... + 1007374.

Almost surely, 2^20147290 is an apocalyptic number.

20147290 is a deficient number, since it is larger than the sum of its proper divisors (16117850).

20147290 is a wasteful number, since it uses less digits than its factorization.

20147290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014736.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 20147290 is about 4488.5732699823. The cubic root of 20147290 is about 272.1064768398.

The spelling of 20147290 in words is "twenty million, one hundred forty-seven thousand, two hundred ninety".