20293838 has 16 divisors (see below), whose sum is σ = 31004160. Its totient is φ = 9961056.

The previous prime is 20293837. The next prime is 20293841. The reversal of 20293838 is 83839202.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20293798 and 20293807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20293837) 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, 27320 + ... + 28052.

It is an arithmetic number, because the mean of its divisors is an integer number (1937760).

Almost surely, 2^20293838 is an apocalyptic number.

20293838 is a deficient number, since it is larger than the sum of its proper divisors (10710322).

20293838 is a wasteful number, since it uses less digits than its factorization.

20293838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 20293838 is about 4504.8682555653. The cubic root of 20293838 is about 272.7646358844.

The spelling of 20293838 in words is "twenty million, two hundred ninety-three thousand, eight hundred thirty-eight".