20587896 has 48 divisors (see below), whose sum is σ = 63726000. Its totient is φ = 5882112.

The previous prime is 20587891. The next prime is 20587909. The reversal of 20587896 is 69878502.

It is a super-2 number, since 2×20587896² = 847722923413632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20587891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19921 + ... + 20928.

It is an arithmetic number, because the mean of its divisors is an integer number (1327625).

Almost surely, 2^20587896 is an apocalyptic number.

It is an amenable number.

20587896 is an abundant number, since it is smaller than the sum of its proper divisors (43138104).

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

20587896 is a wasteful number, since it uses less digits than its factorization.

20587896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40868 (or 40861 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 20587896 is about 4537.3886763203. The cubic root of 20587896 is about 274.0757777870.

The spelling of 20587896 in words is "twenty million, five hundred eighty-seven thousand, eight hundred ninety-six".