20397044 has 12 divisors (see below), whose sum is σ = 37246944. Its totient is φ = 9755064.

The previous prime is 20397031. The next prime is 20397073. The reversal of 20397044 is 44079302.

It is a junction number, because it is equal to n+sod(n) for n = 20396998 and 20397016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110762 + ... + 110945.

It is an arithmetic number, because the mean of its divisors is an integer number (3103912).

Almost surely, 2^20397044 is an apocalyptic number.

It is an amenable number.

20397044 is a deficient number, since it is larger than the sum of its proper divisors (16849900).

20397044 is a wasteful number, since it uses less digits than its factorization.

20397044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221734 (or 221732 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20397044 is about 4516.3086696992. The cubic root of 20397044 is about 273.2262433283.

The spelling of 20397044 in words is "twenty million, three hundred ninety-seven thousand, forty-four".