20897832 has 16 divisors (see below), whose sum is σ = 52244640. Its totient is φ = 6965936.

The previous prime is 20897827. The next prime is 20897839. The reversal of 20897832 is 23879802.

It is not an unprimeable number, because it can be changed into a prime (20897839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435348 + ... + 435395.

It is an arithmetic number, because the mean of its divisors is an integer number (3265290).

Almost surely, 2^20897832 is an apocalyptic number.

It is an amenable number.

20897832 is an abundant number, since it is smaller than the sum of its proper divisors (31346808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20897832 is a wasteful number, since it uses less digits than its factorization.

20897832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870752 (or 870748 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 20897832 is about 4571.4146606931. The cubic root of 20897832 is about 275.4442714103. Note that the first 3 decimals are identical.

The spelling of 20897832 in words is "twenty million, eight hundred ninety-seven thousand, eight hundred thirty-two".