20226642 has 32 divisors (see below), whose sum is σ = 41860800. Its totient is φ = 6510528.

The previous prime is 20226631. The next prime is 20226649. The reversal of 20226642 is 24662202.

It is not an unprimeable number, because it can be changed into a prime (20226649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39484 + ... + 39992.

It is an arithmetic number, because the mean of its divisors is an integer number (1308150).

Almost surely, 2^20226642 is an apocalyptic number.

20226642 is an abundant number, since it is smaller than the sum of its proper divisors (21634158).

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

20226642 is a wasteful number, since it uses less digits than its factorization.

20226642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20226642 is about 4497.4039178175. The cubic root of 20226642 is about 272.4632478561.

Adding to 20226642 its reverse (24662202), we get a palindrome (44888844).

The spelling of 20226642 in words is "twenty million, two hundred twenty-six thousand, six hundred forty-two".