20659438 has 16 divisors (see below), whose sum is σ = 31872096. Its totient is φ = 10039680.

The previous prime is 20659427. The next prime is 20659493. The reversal of 20659438 is 83495602.

It is a junction number, because it is equal to n+sod(n) for n = 20659397 and 20659406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9370 + ... + 11362.

It is an arithmetic number, because the mean of its divisors is an integer number (1992006).

Almost surely, 2^20659438 is an apocalyptic number.

20659438 is a deficient number, since it is larger than the sum of its proper divisors (11212658).

20659438 is a wasteful number, since it uses less digits than its factorization.

20659438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 20659438 is about 4545.2654487939. The cubic root of 20659438 is about 274.3928777118.

The spelling of 20659438 in words is "twenty million, six hundred fifty-nine thousand, four hundred thirty-eight".