20896387 has 8 divisors (see below), whose sum is σ = 21667712. Its totient is φ = 20131200.

The previous prime is 20896367. The next prime is 20896411. The reversal of 20896387 is 78369802.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20896387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20896307) 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, 6073 + ... + 8869.

It is an arithmetic number, because the mean of its divisors is an integer number (2708464).

Almost surely, 2^20896387 is an apocalyptic number.

20896387 is a deficient number, since it is larger than the sum of its proper divisors (771325).

20896387 is a wasteful number, since it uses less digits than its factorization.

20896387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3069.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 20896387 is about 4571.2566106050. The cubic root of 20896387 is about 275.4379226473.

The spelling of 20896387 in words is "twenty million, eight hundred ninety-six thousand, three hundred eighty-seven".