20730004 has 24 divisors (see below), whose sum is σ = 39070080. Its totient is φ = 9588096.

The previous prime is 20729993. The next prime is 20730011. The reversal of 20730004 is 40003702.

It is a self number, because there is not a number n which added to its sum of digits gives 20730004.

It is a congruent number.

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, 1429 + ... + 6595.

It is an arithmetic number, because the mean of its divisors is an integer number (1627920).

Almost surely, 2^20730004 is an apocalyptic number.

It is an amenable number.

20730004 is a deficient number, since it is larger than the sum of its proper divisors (18340076).

20730004 is a wasteful number, since it uses less digits than its factorization.

20730004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5247 (or 5245 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 20730004 is about 4553.0214144016. The cubic root of 20730004 is about 274.7049353105.

Adding to 20730004 its reverse (40003702), we get a palindrome (60733706).

The spelling of 20730004 in words is "twenty million, seven hundred thirty thousand, four".