20716430 has 16 divisors (see below), whose sum is σ = 42616800. Its totient is φ = 7102752.

The previous prime is 20716429. The next prime is 20716453. The reversal of 20716430 is 3461702.

It is a junction number, because it is equal to n+sod(n) for n = 20716396 and 20716405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147905 + ... + 148044.

It is an arithmetic number, because the mean of its divisors is an integer number (2663550).

Almost surely, 2^20716430 is an apocalyptic number.

20716430 is an abundant number, since it is smaller than the sum of its proper divisors (21900370).

20716430 is a wasteful number, since it uses less digits than its factorization.

20716430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295963.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 20716430 is about 4551.5305118169. The cubic root of 20716430 is about 274.6449633174.

The spelling of 20716430 in words is "twenty million, seven hundred sixteen thousand, four hundred thirty".