20887441 has 8 divisors (see below), whose sum is σ = 23280480. Its totient is φ = 18623808.

The previous prime is 20887439. The next prime is 20887457. The reversal of 20887441 is 14478802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20887441 - 2¹ = 20887439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20887397 and 20887406.

It is not an unprimeable number, because it can be changed into a prime (20887541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32011 + ... + 32656.

It is an arithmetic number, because the mean of its divisors is an integer number (2910060).

Almost surely, 2^20887441 is an apocalyptic number.

It is an amenable number.

20887441 is a deficient number, since it is larger than the sum of its proper divisors (2393039).

20887441 is a wasteful number, since it uses less digits than its factorization.

20887441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64703.

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 20887441 is about 4570.2780002971. The cubic root of 20887441 is about 275.3986109173.

The spelling of 20887441 in words is "twenty million, eight hundred eighty-seven thousand, four hundred forty-one".