20354138 has 16 divisors (see below), whose sum is σ = 35385984. Its totient is φ = 8599920.

The previous prime is 20354129. The next prime is 20354153. The reversal of 20354138 is 83145302.

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, 9245 + ... + 11232.

It is an arithmetic number, because the mean of its divisors is an integer number (2211624).

Almost surely, 2^20354138 is an apocalyptic number.

20354138 is a deficient number, since it is larger than the sum of its proper divisors (15031846).

20354138 is a wasteful number, since it uses less digits than its factorization.

20354138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20557.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20354138 is about 4511.5560508543. The cubic root of 20354138 is about 273.0345280520.

The spelling of 20354138 in words is "twenty million, three hundred fifty-four thousand, one hundred thirty-eight".