20712416 has 12 divisors (see below), whose sum is σ = 40777632. Its totient is φ = 10356192.

The previous prime is 20712403. The next prime is 20712431. The reversal of 20712416 is 61421702.

It is a junction number, because it is equal to n+sod(n) for n = 20712391 and 20712400.

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 as a sum of consecutive naturals, namely, 323600 + ... + 323663.

It is an arithmetic number, because the mean of its divisors is an integer number (3398136).

Almost surely, 2^20712416 is an apocalyptic number.

It is an amenable number.

20712416 is a deficient number, since it is larger than the sum of its proper divisors (20065216).

20712416 is an equidigital number, since it uses as much as digits as its factorization.

20712416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647273 (or 647265 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20712416 is about 4551.0895398794. The cubic root of 20712416 is about 274.6272238373.

The spelling of 20712416 in words is "twenty million, seven hundred twelve thousand, four hundred sixteen".