20896447 has 16 divisors (see below), whose sum is σ = 25845120. Its totient is φ = 16610400.

The previous prime is 20896441. The next prime is 20896457. The reversal of 20896447 is 74469802.

It is a cyclic number.

It is not a de Polignac number, because 20896447 - 2¹¹ = 20894399 is a prime.

It is a super-2 number, since 2×20896447² = 873322994447618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20896441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1129 + ... + 6562.

It is an arithmetic number, because the mean of its divisors is an integer number (1615320).

Almost surely, 2^20896447 is an apocalyptic number.

20896447 is a deficient number, since it is larger than the sum of its proper divisors (4948673).

20896447 is a wasteful number, since it uses less digits than its factorization.

20896447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7734.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 20896447 is about 4571.2631733472. The cubic root of 20896447 is about 275.4381862696.

The spelling of 20896447 in words is "twenty million, eight hundred ninety-six thousand, four hundred forty-seven".