20343357 has 12 divisors (see below), whose sum is σ = 30931680. Its totient is φ = 12848328.

The previous prime is 20343331. The next prime is 20343371. The reversal of 20343357 is 75334302.

It is not a de Polignac number, because 20343357 - 2¹⁴ = 20326973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20343357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20343397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59313 + ... + 59654.

It is an arithmetic number, because the mean of its divisors is an integer number (2577640).

Almost surely, 2^20343357 is an apocalyptic number.

It is an amenable number.

20343357 is a deficient number, since it is larger than the sum of its proper divisors (10588323).

20343357 is a wasteful number, since it uses less digits than its factorization.

20343357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118992 (or 118989 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 27.

The square root of 20343357 is about 4510.3610720207. The cubic root of 20343357 is about 272.9863133661.

Adding to 20343357 its reverse (75334302), we get a palindrome (95677659).

The spelling of 20343357 in words is "twenty million, three hundred forty-three thousand, three hundred fifty-seven".