20731941 has 12 divisors (see below), whose sum is σ = 29994432. Its totient is φ = 13799016.

The previous prime is 20731913. The next prime is 20731961. The reversal of 20731941 is 14913702.

It is not a de Polignac number, because 20731941 - 2⁷ = 20731813 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20731961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5620 + ... + 8546.

It is an arithmetic number, because the mean of its divisors is an integer number (2499536).

Almost surely, 2^20731941 is an apocalyptic number.

It is an amenable number.

20731941 is a deficient number, since it is larger than the sum of its proper divisors (9262491).

20731941 is a wasteful number, since it uses less digits than its factorization.

20731941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3720 (or 3717 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 20731941 is about 4553.2341253224. The cubic root of 20731941 is about 274.7134911360.

The spelling of 20731941 in words is "twenty million, seven hundred thirty-one thousand, nine hundred forty-one".