20630615 has 8 divisors (see below), whose sum is σ = 24822720. Its totient is φ = 16460512.

The previous prime is 20630611. The next prime is 20630641. The reversal of 20630615 is 51603602.

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

It is a cyclic number.

It is not a de Polignac number, because 20630615 - 2² = 20630611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20630611) 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, 3359 + ... + 7248.

It is an arithmetic number, because the mean of its divisors is an integer number (3102840).

Almost surely, 2^20630615 is an apocalyptic number.

20630615 is a deficient number, since it is larger than the sum of its proper divisors (4192105).

20630615 is a wasteful number, since it uses less digits than its factorization.

20630615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11001.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 20630615 is about 4542.0936802316. The cubic root of 20630615 is about 274.2652119808.

The spelling of 20630615 in words is "twenty million, six hundred thirty thousand, six hundred fifteen".