20520238 has 8 divisors (see below), whose sum is σ = 30821832. Its totient is φ = 10246296.

The previous prime is 20520229. The next prime is 20520257. The reversal of 20520238 is 83202502.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4945 + ... + 8092.

It is an arithmetic number, because the mean of its divisors is an integer number (3852729).

Almost surely, 2^20520238 is an apocalyptic number.

20520238 is a deficient number, since it is larger than the sum of its proper divisors (10301594).

20520238 is a wasteful number, since it uses less digits than its factorization.

20520238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13826.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20520238 is about 4529.9269309780. The cubic root of 20520238 is about 273.7752165702.

The spelling of 20520238 in words is "twenty million, five hundred twenty thousand, two hundred thirty-eight".