20896538 has 16 divisors (see below), whose sum is σ = 34542816. Its totient is φ = 9419760.

The previous prime is 20896517. The next prime is 20896567. The reversal of 20896538 is 83569802.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20896495 and 20896504.

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, 8228 + ... + 10463.

It is an arithmetic number, because the mean of its divisors is an integer number (2158926).

Almost surely, 2^20896538 is an apocalyptic number.

20896538 is a deficient number, since it is larger than the sum of its proper divisors (13646278).

20896538 is a wasteful number, since it uses less digits than its factorization.

20896538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18749.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 20896538 is about 4571.2731268215. The cubic root of 20896538 is about 275.4385860958.

The spelling of 20896538 in words is "twenty million, eight hundred ninety-six thousand, five hundred thirty-eight".