20943597 has 16 divisors (see below), whose sum is σ = 29327040. Its totient is φ = 13276032.

The previous prime is 20943563. The next prime is 20943599. The reversal of 20943597 is 79534902.

It is not a de Polignac number, because 20943597 - 2⁷ = 20943469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20943599) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4033 + ... + 7625.

It is an arithmetic number, because the mean of its divisors is an integer number (1832940).

Almost surely, 2^20943597 is an apocalyptic number.

It is an amenable number.

20943597 is a deficient number, since it is larger than the sum of its proper divisors (8383443).

20943597 is a wasteful number, since it uses less digits than its factorization.

20943597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3692.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 20943597 is about 4576.4174853263. The cubic root of 20943597 is about 275.6451936295.

The spelling of 20943597 in words is "twenty million, nine hundred forty-three thousand, five hundred ninety-seven".