20736478 has 16 divisors (see below), whose sum is σ = 37094400. Its totient is φ = 8500536.

The previous prime is 20736461. The next prime is 20736491. The reversal of 20736478 is 87463702.

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, 31878 + ... + 32521.

It is an arithmetic number, because the mean of its divisors is an integer number (2318400).

Almost surely, 2^20736478 is an apocalyptic number.

20736478 is a deficient number, since it is larger than the sum of its proper divisors (16357922).

20736478 is a wasteful number, since it uses less digits than its factorization.

20736478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64431.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 20736478 is about 4553.7323153651. The cubic root of 20736478 is about 274.7335292051.

The spelling of 20736478 in words is "twenty million, seven hundred thirty-six thousand, four hundred seventy-eight".