20022947 has 16 divisors (see below), whose sum is σ = 23396352. Its totient is φ = 16783200.

The previous prime is 20022943. The next prime is 20022971. The reversal of 20022947 is 74922002.

It is not a de Polignac number, because 20022947 - 2² = 20022943 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20022943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89678 + ... + 89900.

It is an arithmetic number, because the mean of its divisors is an integer number (1462272).

Almost surely, 2^20022947 is an apocalyptic number.

20022947 is a deficient number, since it is larger than the sum of its proper divisors (3373405).

20022947 is a wasteful number, since it uses less digits than its factorization.

20022947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20022947 is about 4474.7007721187. The cubic root of 20022947 is about 271.5455348833.

Adding to 20022947 its reverse (74922002), we get a palindrome (94944949).

The spelling of 20022947 in words is "twenty million, twenty-two thousand, nine hundred forty-seven".