20220464 has 20 divisors (see below), whose sum is σ = 42739080. Its totient is φ = 9191040.

The previous prime is 20220451. The next prime is 20220467. The reversal of 20220464 is 46402202.

It is not an unprimeable number, because it can be changed into a prime (20220467) 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, 57269 + ... + 57620.

It is an arithmetic number, because the mean of its divisors is an integer number (2136954).

Almost surely, 2^20220464 is an apocalyptic number.

It is an amenable number.

20220464 is an abundant number, since it is smaller than the sum of its proper divisors (22518616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20220464 is a wasteful number, since it uses less digits than its factorization.

20220464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114908 (or 114902 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 20220464 is about 4496.7170246748. The cubic root of 20220464 is about 272.4355047544.

Adding to 20220464 its reverse (46402202), we get a palindrome (66622666).

The spelling of 20220464 in words is "twenty million, two hundred twenty thousand, four hundred sixty-four".