20869238 has 16 divisors (see below), whose sum is σ = 33944400. Its totient is φ = 9565536.

The previous prime is 20869237. The next prime is 20869273. The reversal of 20869238 is 83296802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20869237) 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, 1181 + ... + 6567.

It is an arithmetic number, because the mean of its divisors is an integer number (2121525).

Almost surely, 2^20869238 is an apocalyptic number.

20869238 is a deficient number, since it is larger than the sum of its proper divisors (13075162).

20869238 is a wasteful number, since it uses less digits than its factorization.

20869238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5551.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 20869238 is about 4568.2861118805. The cubic root of 20869238 is about 275.3185861489.

The spelling of 20869238 in words is "twenty million, eight hundred sixty-nine thousand, two hundred thirty-eight".