20342512 has 20 divisors (see below), whose sum is σ = 39537400. Its totient is φ = 10139328.

The previous prime is 20342503. The next prime is 20342527. The reversal of 20342512 is 21524302.

It is a self number, because there is not a number n which added to its sum of digits gives 20342512.

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, 3763 + ... + 7405.

It is an arithmetic number, because the mean of its divisors is an integer number (1976870).

Almost surely, 2^20342512 is an apocalyptic number.

It is an amenable number.

20342512 is a deficient number, since it is larger than the sum of its proper divisors (19194888).

20342512 is a wasteful number, since it uses less digits than its factorization.

20342512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000 (or 3994 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20342512 is about 4510.2673978380. The cubic root of 20342512 is about 272.9825336453.

Adding to 20342512 its reverse (21524302), we get a palindrome (41866814).

The spelling of 20342512 in words is "twenty million, three hundred forty-two thousand, five hundred twelve".