20839388 has 12 divisors (see below), whose sum is σ = 37157400. Its totient is φ = 10222992.

The previous prime is 20839381. The next prime is 20839393. The reversal of 20839388 is 88393802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20839381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48938 + ... + 49361.

It is an arithmetic number, because the mean of its divisors is an integer number (3096450).

Almost surely, 2^20839388 is an apocalyptic number.

It is an amenable number.

20839388 is a deficient number, since it is larger than the sum of its proper divisors (16318012).

20839388 is a wasteful number, since it uses less digits than its factorization.

20839388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98356 (or 98354 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 20839388 is about 4565.0178531962. The cubic root of 20839388 is about 275.1872575845.

The spelling of 20839388 in words is "twenty million, eight hundred thirty-nine thousand, three hundred eighty-eight".