42001234020 has 144 divisors (see below), whose sum is σ = 132854117760. Its totient is φ = 11016190080.

The previous prime is 42001234003. The next prime is 42001234049. The reversal of 42001234020 is 2043210024.

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

It is a junction number, because it is equal to n+sod(n) for n = 42001233984 and 42001234002.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1998889 + ... + 2019791.

It is an arithmetic number, because the mean of its divisors is an integer number (922598040).

Almost surely, 2^42001234020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42001234020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66427058880).

42001234020 is an abundant number, since it is smaller than the sum of its proper divisors (90852883740).

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

42001234020 is a wasteful number, since it uses less digits than its factorization.

42001234020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21043 (or 20974 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 42001234020 its reverse (2043210024), we get a palindrome (44044444044).

The spelling of 42001234020 in words is "forty-two billion, one million, two hundred thirty-four thousand, twenty".