20717430 has 32 divisors (see below), whose sum is σ = 50541408. Its totient is φ = 5433600.

The previous prime is 20717419. The next prime is 20717449. The reversal of 20717430 is 3471702.

It is a self number, because there is not a number n which added to its sum of digits gives 20717430.

It is a congruent 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, 3831 + ... + 7490.

It is an arithmetic number, because the mean of its divisors is an integer number (1579419).

Almost surely, 2^20717430 is an apocalyptic number.

20717430 is an abundant number, since it is smaller than the sum of its proper divisors (29823978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20717430 is a wasteful number, since it uses less digits than its factorization.

20717430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11392.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 20717430 is about 4551.6403636491. The cubic root of 20717430 is about 274.6493823630.

The spelling of 20717430 in words is "twenty million, seven hundred seventeen thousand, four hundred thirty".