20630715 has 24 divisors (see below), whose sum is σ = 38399760. Its totient is φ = 9430848.

The previous prime is 20630711. The next prime is 20630761. The reversal of 20630715 is 51703602.

It is not a de Polignac number, because 20630715 - 2² = 20630711 is a prime.

It is a super-2 number, since 2×20630715² = 851252802822450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20630711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13300 + ... + 14769.

It is an arithmetic number, because the mean of its divisors is an integer number (1599990).

Almost surely, 2^20630715 is an apocalyptic number.

20630715 is a deficient number, since it is larger than the sum of its proper divisors (17769045).

20630715 is a wasteful number, since it uses less digits than its factorization.

20630715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28091 (or 28084 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 20630715 is about 4542.1046883576. The cubic root of 20630715 is about 274.2656551163.

The spelling of 20630715 in words is "twenty million, six hundred thirty thousand, seven hundred fifteen".