20896837 has 4 divisors (see below), whose sum is σ = 22504300. Its totient is φ = 19289376.

The previous prime is 20896817. The next prime is 20896847. The reversal of 20896837 is 73869802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 835396 + 20061441 = 914^2 + 4479^2 .

It is a cyclic number.

It is not a de Polignac number, because 20896837 - 2²³ = 12508229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20896793 and 20896802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20896817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 803712 + ... + 803737.

It is an arithmetic number, because the mean of its divisors is an integer number (5626075).

Almost surely, 2^20896837 is an apocalyptic number.

It is an amenable number.

20896837 is a deficient number, since it is larger than the sum of its proper divisors (1607463).

20896837 is a wasteful number, since it uses less digits than its factorization.

20896837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607462.

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

The square root of 20896837 is about 4571.3058309415. The cubic root of 20896837 is about 275.4398998021.

The spelling of 20896837 in words is "twenty million, eight hundred ninety-six thousand, eight hundred thirty-seven".