20202047 has 4 divisors (see below), whose sum is σ = 20221656. Its totient is φ = 20182440.

The previous prime is 20202031. The next prime is 20202071. The reversal of 20202047 is 74020202.

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 20202047 - 2⁴ = 20202031 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 (20202097) 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, 8168 + ... + 10349.

It is an arithmetic number, because the mean of its divisors is an integer number (5055414).

Almost surely, 2^20202047 is an apocalyptic number.

20202047 is a deficient number, since it is larger than the sum of its proper divisors (19609).

20202047 is a wasteful number, since it uses less digits than its factorization.

20202047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19608.

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 20202047 is about 4494.6687308410. The cubic root of 20202047 is about 272.3527673063.

Adding to 20202047 its reverse (74020202), we get a palindrome (94222249).

The spelling of 20202047 in words is "twenty million, two hundred two thousand, forty-seven".