20022147 has 20 divisors (see below), whose sum is σ = 30126096. Its totient is φ = 13251600.

The previous prime is 20022137. The next prime is 20022179. The reversal of 20022147 is 74122002.

It is not a de Polignac number, because 20022147 - 2¹⁴ = 20005763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20022127) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11413 + ... + 13049.

Almost surely, 2^20022147 is an apocalyptic number.

20022147 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20022147 is a deficient number, since it is larger than the sum of its proper divisors (10103949).

20022147 is a wasteful number, since it uses less digits than its factorization.

20022147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800 (or 1791 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 20022147 is about 4474.6113797737. The cubic root of 20022147 is about 271.5419183773.

Adding to 20022147 its reverse (74122002), we get a palindrome (94144149).

The spelling of 20022147 in words is "twenty million, twenty-two thousand, one hundred forty-seven".