420020204142142 has 4 divisors (see below), whose sum is σ = 630030306213216. Its totient is φ = 210010102071070.

The previous prime is 420020204142131. The next prime is 420020204142167. The reversal of 420020204142142 is 241241402020024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 420020204142142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105005051035534 + ... + 105005051035537.

It is an arithmetic number, because the mean of its divisors is an integer number (157507576553304).

Almost surely, 2^{420020204142142} is an apocalyptic number.

420020204142142 is a deficient number, since it is larger than the sum of its proper divisors (210010102071074).

420020204142142 is a wasteful number, since it uses less digits than its factorization.

420020204142142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210010102071073.

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 420020204142142 its reverse (241241402020024), we get a palindrome (661261606162166).

The spelling of 420020204142142 in words is "four hundred twenty trillion, twenty billion, two hundred four million, one hundred forty-two thousand, one hundred forty-two".