20711630 has 16 divisors (see below), whose sum is σ = 37430640. Its totient is φ = 8251392.

The previous prime is 20711629. The next prime is 20711641. The reversal of 20711630 is 3611702.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1460 + ... + 6599.

It is an arithmetic number, because the mean of its divisors is an integer number (2339415).

Almost surely, 2^20711630 is an apocalyptic number.

20711630 is a deficient number, since it is larger than the sum of its proper divisors (16719010).

20711630 is a wasteful number, since it uses less digits than its factorization.

20711630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8323.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 20711630 is about 4551.0031861118. The cubic root of 20711630 is about 274.6237499189.

The spelling of 20711630 in words is "twenty million, seven hundred eleven thousand, six hundred thirty".