20887941 has 4 divisors (see below), whose sum is σ = 27850592. Its totient is φ = 13925292.

The previous prime is 20887939. The next prime is 20887949. The reversal of 20887941 is 14978802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20887941 - 2¹ = 20887939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20887941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20887949) 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, 3481321 + ... + 3481326.

It is an arithmetic number, because the mean of its divisors is an integer number (6962648).

Almost surely, 2^20887941 is an apocalyptic number.

It is an amenable number.

20887941 is a deficient number, since it is larger than the sum of its proper divisors (6962651).

20887941 is an equidigital number, since it uses as much as digits as its factorization.

20887941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6962650.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 20887941 is about 4570.3327012374. The cubic root of 20887941 is about 275.4008083814.

The spelling of 20887941 in words is "twenty million, eight hundred eighty-seven thousand, nine hundred forty-one".