20229738 has 16 divisors (see below), whose sum is σ = 40877760. Its totient is φ = 6673536.

The previous prime is 20229731. The next prime is 20229757. The reversal of 20229738 is 83792202.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20229699 and 20229708.

It is not an unprimeable number, because it can be changed into a prime (20229731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16798 + ... + 17961.

It is an arithmetic number, because the mean of its divisors is an integer number (2554860).

Almost surely, 2^20229738 is an apocalyptic number.

20229738 is an abundant number, since it is smaller than the sum of its proper divisors (20648022).

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

20229738 is a wasteful number, since it uses less digits than its factorization.

20229738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34861.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 20229738 is about 4497.7481032179. The cubic root of 20229738 is about 272.4771487165.

The spelling of 20229738 in words is "twenty million, two hundred twenty-nine thousand, seven hundred thirty-eight".