20941481 has 8 divisors (see below), whose sum is σ = 23121504. Its totient is φ = 18807520.

The previous prime is 20941471. The next prime is 20941489. The reversal of 20941481 is 18414902.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20941481 is a prime.

It is a super-2 number, since 2×20941481² = 877091252946722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20941489) 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, 10556 + ... + 12381.

It is an arithmetic number, because the mean of its divisors is an integer number (2890188).

Almost surely, 2^20941481 is an apocalyptic number.

It is an amenable number.

20941481 is a deficient number, since it is larger than the sum of its proper divisors (2180023).

20941481 is a wasteful number, since it uses less digits than its factorization.

20941481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23031.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 20941481 is about 4576.1862942848. The cubic root of 20941481 is about 275.6359102055.

The spelling of 20941481 in words is "twenty million, nine hundred forty-one thousand, four hundred eighty-one".