20220447 has 8 divisors (see below), whose sum is σ = 29034544. Its totient is φ = 12443328.

The previous prime is 20220407. The next prime is 20220451. The reversal of 20220447 is 74402202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20220447 - 2⁶ = 20220383 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 (20220407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259198 + ... + 259275.

It is an arithmetic number, because the mean of its divisors is an integer number (3629318).

Almost surely, 2^20220447 is an apocalyptic number.

20220447 is a deficient number, since it is larger than the sum of its proper divisors (8814097).

20220447 is a wasteful number, since it uses less digits than its factorization.

20220447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518489.

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 20220447 is about 4496.7151344064. The cubic root of 20220447 is about 272.4354284060.

Adding to 20220447 its reverse (74402202), we get a palindrome (94622649).

The spelling of 20220447 in words is "twenty million, two hundred twenty thousand, four hundred forty-seven".