20205403142 has 8 divisors (see below), whose sum is σ = 32090934456. Its totient is φ = 9508424992.

The previous prime is 20205403133. The next prime is 20205403237. The reversal of 20205403142 is 24130450202.

It is a happy number.

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

It is a super-2 number, since 2×20205403142² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297138248 + ... + 297138315.

It is an arithmetic number, because the mean of its divisors is an integer number (4011366807).

Almost surely, 2^20205403142 is an apocalyptic number.

20205403142 is a deficient number, since it is larger than the sum of its proper divisors (11885531314).

20205403142 is a wasteful number, since it uses less digits than its factorization.

20205403142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594276582.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 20205403142 its reverse (24130450202), we get a palindrome (44335853344).

The spelling of 20205403142 in words is "twenty billion, two hundred five million, four hundred three thousand, one hundred forty-two".