20653630 has 8 divisors (see below), whose sum is σ = 37176552. Its totient is φ = 8261448.

The previous prime is 20653579. The next prime is 20653639. The reversal of 20653630 is 3635602.

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

It is a junction number, because it is equal to n+sod(n) for n = 20653595 and 20653604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20653639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1032672 + ... + 1032691.

It is an arithmetic number, because the mean of its divisors is an integer number (4647069).

Almost surely, 2^20653630 is an apocalyptic number.

20653630 is a deficient number, since it is larger than the sum of its proper divisors (16522922).

20653630 is a wasteful number, since it uses less digits than its factorization.

20653630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2065370.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 20653630 is about 4544.6264973043. The cubic root of 20653630 is about 274.3671618913.

The spelling of 20653630 in words is "twenty million, six hundred fifty-three thousand, six hundred thirty".