20396943 has 18 divisors (see below), whose sum is σ = 33730424. Its totient is φ = 11634912.

The previous prime is 20396941. The next prime is 20396963. The reversal of 20396943 is 34969302.

It is a happy number.

It is not a de Polignac number, because 20396943 - 2¹ = 20396941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20396898 and 20396907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20396941) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 35563 + ... + 36131.

Almost surely, 2^20396943 is an apocalyptic number.

20396943 is a deficient number, since it is larger than the sum of its proper divisors (13333481).

20396943 is an frugal number, since it uses more digits than its factorization.

20396943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151 (or 579 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 20396943 is about 4516.2974879873. The cubic root of 20396943 is about 273.2257923496.

The spelling of 20396943 in words is "twenty million, three hundred ninety-six thousand, nine hundred forty-three".