20497364 has 12 divisors (see below), whose sum is σ = 35952084. Its totient is φ = 10225344.

The previous prime is 20497363. The next prime is 20497387. The reversal of 20497364 is 46379402.

It can be written as a sum of positive squares in 2 ways, for example, as 8456464 + 12040900 = 2908^2 + 3470^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20497363) 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, 3779 + ... + 7434.

It is an arithmetic number, because the mean of its divisors is an integer number (2996007).

Almost surely, 2^20497364 is an apocalyptic number.

It is an amenable number.

20497364 is a deficient number, since it is larger than the sum of its proper divisors (15454720).

20497364 is a wasteful number, since it uses less digits than its factorization.

20497364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11674 (or 11672 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 20497364 is about 4527.4014622077. The cubic root of 20497364 is about 273.6734526006.

The spelling of 20497364 in words is "twenty million, four hundred ninety-seven thousand, three hundred sixty-four".