20747246 has 16 divisors (see below), whose sum is σ = 34597248. Its totient is φ = 9266400.

The previous prime is 20747239. The next prime is 20747263. The reversal of 20747246 is 64274702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12065 + ... + 13676.

It is an arithmetic number, because the mean of its divisors is an integer number (2162328).

Almost surely, 2^20747246 is an apocalyptic number.

20747246 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20747246 is a deficient number, since it is larger than the sum of its proper divisors (13850002).

20747246 is a wasteful number, since it uses less digits than its factorization.

20747246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25787.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 20747246 is about 4554.9144887692. The cubic root of 20747246 is about 274.7810753494.

The spelling of 20747246 in words is "twenty million, seven hundred forty-seven thousand, two hundred forty-six".