20602138 has 8 divisors (see below), whose sum is σ = 31108320. Its totient is φ = 10232700.

The previous prime is 20602123. The next prime is 20602157. The reversal of 20602138 is 83120602.

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

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, 33808 + ... + 34411.

It is an arithmetic number, because the mean of its divisors is an integer number (3888540).

Almost surely, 2^20602138 is an apocalyptic number.

20602138 is a deficient number, since it is larger than the sum of its proper divisors (10506182).

20602138 is a wasteful number, since it uses less digits than its factorization.

20602138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68372.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20602138 is about 4538.9578098942. The cubic root of 20602138 is about 274.1389619592.

The spelling of 20602138 in words is "twenty million, six hundred two thousand, one hundred thirty-eight".