20630236 has 12 divisors (see below), whose sum is σ = 39385080. Its totient is φ = 9377360.

The previous prime is 20630213. The next prime is 20630243. The reversal of 20630236 is 63203602.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234391 + ... + 234478.

It is an arithmetic number, because the mean of its divisors is an integer number (3282090).

Almost surely, 2^20630236 is an apocalyptic number.

It is an amenable number.

20630236 is a deficient number, since it is larger than the sum of its proper divisors (18754844).

20630236 is a wasteful number, since it uses less digits than its factorization.

20630236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468884 (or 468882 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 20630236 is about 4542.0519591920. The cubic root of 20630236 is about 274.2635324840.

Adding to 20630236 its reverse (63203602), we get a palindrome (83833838).

The spelling of 20630236 in words is "twenty million, six hundred thirty thousand, two hundred thirty-six".