20358513 has 16 divisors (see below), whose sum is σ = 34469760. Its totient is φ = 11633328.

The previous prime is 20358511. The next prime is 20358523. The reversal of 20358513 is 31585302.

It is not a de Polignac number, because 20358513 - 2¹ = 20358511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20358511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53670 + ... + 54047.

It is an arithmetic number, because the mean of its divisors is an integer number (2154360).

Almost surely, 2^20358513 is an apocalyptic number.

It is an amenable number.

20358513 is a deficient number, since it is larger than the sum of its proper divisors (14111247).

20358513 is a wasteful number, since it uses less digits than its factorization.

20358513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107733 (or 107727 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 20358513 is about 4512.0408907722. The cubic root of 20358513 is about 273.0540890291.

The spelling of 20358513 in words is "twenty million, three hundred fifty-eight thousand, five hundred thirteen".