20630515 has 16 divisors (see below), whose sum is σ = 25463808. Its totient is φ = 16039296.

The previous prime is 20630507. The next prime is 20630543. The reversal of 20630515 is 51503602.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20630515 - 2³ = 20630507 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33349 + ... + 33961.

It is an arithmetic number, because the mean of its divisors is an integer number (1591488).

Almost surely, 2^20630515 is an apocalyptic number.

20630515 is a deficient number, since it is larger than the sum of its proper divisors (4833293).

20630515 is a wasteful number, since it uses less digits than its factorization.

20630515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 20630515 is about 4542.0826720790. The cubic root of 20630515 is about 274.2647688438.

The spelling of 20630515 in words is "twenty million, six hundred thirty thousand, five hundred fifteen".