20536747 has 8 divisors (see below), whose sum is σ = 25604352. Its totient is φ = 16002600.

The previous prime is 20536729. The next prime is 20536751. The reversal of 20536747 is 74763502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20536747 - 2⁷ = 20536619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20536717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133279 + ... + 133432.

It is an arithmetic number, because the mean of its divisors is an integer number (3200544).

Almost surely, 2^20536747 is an apocalyptic number.

20536747 is a deficient number, since it is larger than the sum of its proper divisors (5067605).

20536747 is a wasteful number, since it uses less digits than its factorization.

20536747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266729.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 20536747 is about 4531.7487794449. The cubic root of 20536747 is about 273.8486163607.

The spelling of 20536747 in words is "twenty million, five hundred thirty-six thousand, seven hundred forty-seven".