20507047 has 8 divisors (see below), whose sum is σ = 22445712. Its totient is φ = 18580800.

The previous prime is 20507033. The next prime is 20507051. The reversal of 20507047 is 74070502.

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

It is a cyclic number.

It is not a de Polignac number, because 20507047 - 2¹¹ = 20504999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20507017) 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, 547 + ... + 6427.

It is an arithmetic number, because the mean of its divisors is an integer number (2805714).

Almost surely, 2^20507047 is an apocalyptic number.

20507047 is a deficient number, since it is larger than the sum of its proper divisors (1938665).

20507047 is a wasteful number, since it uses less digits than its factorization.

20507047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6209.

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 20507047 is about 4528.4707131658. The cubic root of 20507047 is about 273.7165404641.

Adding to 20507047 its reverse (74070502), we get a palindrome (94577549).

The spelling of 20507047 in words is "twenty million, five hundred seven thousand, forty-seven".