20147039 has 8 divisors (see below), whose sum is σ = 22012032. Its totient is φ = 18287640.

The previous prime is 20147033. The next prime is 20147059. The reversal of 20147039 is 93074102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20147039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20146999 and 20147017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20147033) 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, 10832 + ... + 12554.

It is an arithmetic number, because the mean of its divisors is an integer number (2751504).

Almost surely, 2^20147039 is an apocalyptic number.

20147039 is a deficient number, since it is larger than the sum of its proper divisors (1864993).

20147039 is a wasteful number, since it uses less digits than its factorization.

20147039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2797.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20147039 is about 4488.5453100086. The cubic root of 20147039 is about 272.1053468448.

The spelling of 20147039 in words is "twenty million, one hundred forty-seven thousand, thirty-nine".