20836497 has 8 divisors (see below), whose sum is σ = 30307680. Its totient is φ = 12628160.

The previous prime is 20836477. The next prime is 20836507. The reversal of 20836497 is 79463802.

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 20836497 - 2¹⁴ = 20820113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20836427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315672 + ... + 315737.

It is an arithmetic number, because the mean of its divisors is an integer number (3788460).

Almost surely, 2^20836497 is an apocalyptic number.

It is an amenable number.

20836497 is a deficient number, since it is larger than the sum of its proper divisors (9471183).

20836497 is a wasteful number, since it uses less digits than its factorization.

20836497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631423.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 20836497 is about 4564.7011950400. The cubic root of 20836497 is about 275.1745316325.

The spelling of 20836497 in words is "twenty million, eight hundred thirty-six thousand, four hundred ninety-seven".