42020021412 has 18 divisors (see below), whose sum is σ = 106217276438. Its totient is φ = 14006673792.

The previous prime is 42020021401. The next prime is 42020021447. The reversal of 42020021412 is 21412002024.

42020021412 is a `hidden beast` number, since 420 + 20 + 0 + 214 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 41137574976 + 882446436 = 202824^2 + 29706^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 583611373 + ... + 583611444.

Almost surely, 2^42020021412 is an apocalyptic number.

It is an amenable number.

42020021412 is an abundant number, since it is smaller than the sum of its proper divisors (64197255026).

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

42020021412 is a wasteful number, since it uses less digits than its factorization.

42020021412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167222827 (or 1167222822 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 42020021412 its reverse (21412002024), we get a palindrome (63432023436).

The spelling of 42020021412 in words is "forty-two billion, twenty million, twenty-one thousand, four hundred twelve".