20630787 has 8 divisors (see below), whose sum is σ = 27535104. Its totient is φ = 13740168.

The previous prime is 20630783. The next prime is 20630851. The reversal of 20630787 is 78703602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20630787 - 2² = 20630783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20630783) 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, 858 + ... + 6480.

It is an arithmetic number, because the mean of its divisors is an integer number (3441888).

Almost surely, 2^20630787 is an apocalyptic number.

20630787 is a deficient number, since it is larger than the sum of its proper divisors (6904317).

20630787 is a wasteful number, since it uses less digits than its factorization.

20630787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6849.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 20630787 is about 4542.1126141918. The cubic root of 20630787 is about 274.2659741730.

The spelling of 20630787 in words is "twenty million, six hundred thirty thousand, seven hundred eighty-seven".