20630086 has 16 divisors (see below), whose sum is σ = 33269760. Its totient is φ = 9563400.

The previous prime is 20630083. The next prime is 20630087. The reversal of 20630086 is 68003602.

20630086 = 1033² + 1034² + ... + 1051².

It is a self number, because there is not a number n which added to its sum of digits gives 20630086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20630083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3990 + ... + 7561.

It is an arithmetic number, because the mean of its divisors is an integer number (2079360).

Almost surely, 2^20630086 is an apocalyptic number.

20630086 is a deficient number, since it is larger than the sum of its proper divisors (12639674).

20630086 is a wasteful number, since it uses less digits than its factorization.

20630086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11619.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 20630086 is about 4542.0354468014. The cubic root of 20630086 is about 274.2628677699.

Adding to 20630086 its reverse (68003602), we get a palindrome (88633688).

The spelling of 20630086 in words is "twenty million, six hundred thirty thousand, eighty-six".