20070630 has 24 divisors (see below), whose sum is σ = 52183872. Its totient is φ = 5352144.

The previous prime is 20070601. The next prime is 20070691. The reversal of 20070630 is 3607002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111414 + ... + 111593.

It is an arithmetic number, because the mean of its divisors is an integer number (2174328).

Almost surely, 2^20070630 is an apocalyptic number.

20070630 is an abundant number, since it is smaller than the sum of its proper divisors (32113242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20070630 is a wasteful number, since it uses less digits than its factorization.

20070630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223020 (or 223017 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 20070630 is about 4480.0256695693. The cubic root of 20070630 is about 271.7609184468.

Adding to 20070630 its reverse (3607002), we get a palindrome (23677632).

The spelling of 20070630 in words is "twenty million, seventy thousand, six hundred thirty".