20357793 has 24 divisors (see below), whose sum is σ = 30640896. Its totient is φ = 13010400.

The previous prime is 20357767. The next prime is 20357803. The reversal of 20357793 is 39775302.

It is a happy number.

It is not a de Polignac number, because 20357793 - 2⁵ = 20357761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20357693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36271 + ... + 36827.

It is an arithmetic number, because the mean of its divisors is an integer number (1276704).

Almost surely, 2^20357793 is an apocalyptic number.

It is an amenable number.

20357793 is a deficient number, since it is larger than the sum of its proper divisors (10283103).

20357793 is a wasteful number, since it uses less digits than its factorization.

20357793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725 (or 722 counting only the distinct ones).

The product of its (nonzero) digits is 39690, while the sum is 36.

The square root of 20357793 is about 4511.9611035557. The cubic root of 20357793 is about 273.0508700438.

The spelling of 20357793 in words is "twenty million, three hundred fifty-seven thousand, seven hundred ninety-three".