20510342 has 8 divisors (see below), whose sum is σ = 32103216. Its totient is φ = 9809272.

The previous prime is 20510339. The next prime is 20510353. The reversal of 20510342 is 24301502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20510342.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 222893 + ... + 222984.

It is an arithmetic number, because the mean of its divisors is an integer number (4012902).

Almost surely, 2^20510342 is an apocalyptic number.

20510342 is a deficient number, since it is larger than the sum of its proper divisors (11592874).

20510342 is a wasteful number, since it uses less digits than its factorization.

20510342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445902.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20510342 is about 4528.8345079060. The cubic root of 20510342 is about 273.7311996152.

Adding to 20510342 its reverse (24301502), we get a palindrome (44811844).

The spelling of 20510342 in words is "twenty million, five hundred ten thousand, three hundred forty-two".