42102020544 has 28 divisors (see below), whose sum is σ = 111394929864. Its totient is φ = 14034006784.

The previous prime is 42102020507. The next prime is 42102020563. The reversal of 42102020544 is 44502020124.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109640487 + ... + 109640870.

Almost surely, 2^42102020544 is an apocalyptic number.

It is an amenable number.

42102020544 is an abundant number, since it is smaller than the sum of its proper divisors (69292909320).

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

42102020544 is a wasteful number, since it uses less digits than its factorization.

42102020544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219281372 (or 219281362 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

Adding to 42102020544 its reverse (44502020124), we get a palindrome (86604040668).

The spelling of 42102020544 in words is "forty-two billion, one hundred two million, twenty thousand, five hundred forty-four".