20835897 has 16 divisors (see below), whose sum is σ = 29577600. Its totient is φ = 13001472.

The previous prime is 20835889. The next prime is 20835911. The reversal of 20835897 is 79853802.

It is not a de Polignac number, because 20835897 - 2³ = 20835889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20835827) 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, 9123 + ... + 11175.

It is an arithmetic number, because the mean of its divisors is an integer number (1848600).

Almost surely, 2^20835897 is an apocalyptic number.

It is an amenable number.

20835897 is a deficient number, since it is larger than the sum of its proper divisors (8741703).

20835897 is a wasteful number, since it uses less digits than its factorization.

20835897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 20835897 is about 4564.6354728499. The cubic root of 20835897 is about 275.1718903327.

The spelling of 20835897 in words is "twenty million, eight hundred thirty-five thousand, eight hundred ninety-seven".