20730038 has 48 divisors (see below), whose sum is σ = 40038624.
Its totient is φ = 7983360.
The previous prime is 20730037. The next prime is 20730053. The reversal of 20730038 is 83003702.
It is a Harshad number since it is a multiple of its sum of digits (23).
It is a junction number, because it is equal to n+sod(n) for n = 20729995 and 20730022.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (20730037) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38048 + ... + 38588.
It is an arithmetic number, because the mean of its divisors is an integer number (834138).
Almost surely, 220730038 is an apocalyptic number.
20730038 is a deficient number, since it is larger than the sum of its proper divisors (19308586).
20730038 is a wasteful number, since it uses less digits than its factorization.
20730038 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 597 (or 590 counting only the distinct ones).
The product of its (nonzero) digits is 1008, while the sum is 23.
The square root of 20730038 is about 4553.0251481844.
The cubic root of 20730038 is about 274.7050854948.
The spelling of 20730038 in words is "twenty million, seven hundred thirty thousand, thirty-eight".