20463047 has 4 divisors (see below), whose sum is σ = 22323336. Its totient is φ = 18602760.

The previous prime is 20463043. The next prime is 20463097. The reversal of 20463047 is 74036402.

It is a happy number.

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

It is not a de Polignac number, because 20463047 - 2² = 20463043 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 (20463043) 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, 930128 + ... + 930149.

It is an arithmetic number, because the mean of its divisors is an integer number (5580834).

Almost surely, 2^20463047 is an apocalyptic number.

20463047 is a deficient number, since it is larger than the sum of its proper divisors (1860289).

20463047 is a wasteful number, since it uses less digits than its factorization.

20463047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860288.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 20463047 is about 4523.6099522395. The cubic root of 20463047 is about 273.5206378619.

Adding to 20463047 its reverse (74036402), we get a palindrome (94499449).

The spelling of 20463047 in words is "twenty million, four hundred sixty-three thousand, forty-seven".