20984941 has 4 divisors (see below), whose sum is σ = 21002652. Its totient is φ = 20967232.

The previous prime is 20984933. The next prime is 20984963. The reversal of 20984941 is 14948902.

It is a happy number.

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 18275625 + 2709316 = 4275^2 + 1646^2 .

It is a cyclic number.

It is not a de Polignac number, because 20984941 - 2³ = 20984933 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 20984941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20984921) 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, 6940 + ... + 9493.

It is an arithmetic number, because the mean of its divisors is an integer number (5250663).

Almost surely, 2^20984941 is an apocalyptic number.

It is an amenable number.

20984941 is a deficient number, since it is larger than the sum of its proper divisors (17711).

20984941 is a wasteful number, since it uses less digits than its factorization.

20984941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17710.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 20984941 is about 4580.9323286859. The cubic root of 20984941 is about 275.8264548221.

The spelling of 20984941 in words is "twenty million, nine hundred eighty-four thousand, nine hundred forty-one".