20654138 has 8 divisors (see below), whose sum is σ = 32328288. Its totient is φ = 9878044.

The previous prime is 20654107. The next prime is 20654143. The reversal of 20654138 is 83145602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20654138.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224456 + ... + 224547.

It is an arithmetic number, because the mean of its divisors is an integer number (4041036).

Almost surely, 2^20654138 is an apocalyptic number.

20654138 is a deficient number, since it is larger than the sum of its proper divisors (11674150).

20654138 is a wasteful number, since it uses less digits than its factorization.

20654138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449028.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 20654138 is about 4544.6823871421. The cubic root of 20654138 is about 274.3694113324.

The spelling of 20654138 in words is "twenty million, six hundred fifty-four thousand, one hundred thirty-eight".