20229438 has 16 divisors (see below), whose sum is σ = 40631040. Its totient is φ = 6714456.

The previous prime is 20229431. The next prime is 20229463. The reversal of 20229438 is 83492202.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20229431) 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, 5620 + ... + 8487.

It is an arithmetic number, because the mean of its divisors is an integer number (2539440).

Almost surely, 2^20229438 is an apocalyptic number.

20229438 is an abundant number, since it is smaller than the sum of its proper divisors (20401602).

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

20229438 is a wasteful number, since it uses less digits than its factorization.

20229438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14351.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20229438 is about 4497.7147530718. The cubic root of 20229438 is about 272.4758017959.

The spelling of 20229438 in words is "twenty million, two hundred twenty-nine thousand, four hundred thirty-eight".