642018242420 has 48 divisors (see below), whose sum is σ = 1370727434496. Its totient is φ = 252526032000.

The previous prime is 642018242389. The next prime is 642018242461. The reversal of 642018242420 is 24242810246.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4357355 + ... + 4502285.

It is an arithmetic number, because the mean of its divisors is an integer number (28556821552).

Almost surely, 2^642018242420 is an apocalyptic number.

It is an amenable number.

642018242420 is an abundant number, since it is smaller than the sum of its proper divisors (728709192076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642018242420 is a wasteful number, since it uses less digits than its factorization.

642018242420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148632 (or 148630 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 35.

The spelling of 642018242420 in words is "six hundred forty-two billion, eighteen million, two hundred forty-two thousand, four hundred twenty".