20607047 has 4 divisors (see below), whose sum is σ = 20710800. Its totient is φ = 20503296.

The previous prime is 20607029. The next prime is 20607049. The reversal of 20607047 is 74070602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20607047 - 2¹⁶ = 20541511 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 (20607049) 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, 51578 + ... + 51975.

It is an arithmetic number, because the mean of its divisors is an integer number (5177700).

Almost surely, 2^20607047 is an apocalyptic number.

20607047 is a deficient number, since it is larger than the sum of its proper divisors (103753).

20607047 is a wasteful number, since it uses less digits than its factorization.

20607047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103752.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 20607047 is about 4539.4985405879. The cubic root of 20607047 is about 274.1607338305.

Adding to 20607047 its reverse (74070602), we get a palindrome (94677649).

The spelling of 20607047 in words is "twenty million, six hundred seven thousand, forty-seven".