20887672 has 16 divisors (see below), whose sum is σ = 42177240. Its totient is φ = 9640416.

The previous prime is 20887667. The next prime is 20887673. The reversal of 20887672 is 27678802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20887673) 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, 100318 + ... + 100525.

Almost surely, 2^20887672 is an apocalyptic number.

It is an amenable number.

20887672 is an abundant number, since it is smaller than the sum of its proper divisors (21289568).

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

20887672 is a wasteful number, since it uses less digits than its factorization.

20887672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200862 (or 200858 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 20887672 is about 4570.3032722129. The cubic root of 20887672 is about 275.3996261501.

The spelling of 20887672 in words is "twenty million, eight hundred eighty-seven thousand, six hundred seventy-two".