20004020442 has 64 divisors (see below), whose sum is σ = 52442726400. Its totient is φ = 5531062320.

The previous prime is 20004020431. The next prime is 20004020467. The reversal of 20004020442 is 24402040002.

20004020442 is a `hidden beast` number, since 200 + 0 + 4 + 0 + 20 + 442 = 666.

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 31 ways as a sum of consecutive naturals, for example, 841842 + ... + 865277.

It is an arithmetic number, because the mean of its divisors is an integer number (819417600).

Almost surely, 2^20004020442 is an apocalyptic number.

20004020442 is an abundant number, since it is smaller than the sum of its proper divisors (32438705958).

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

20004020442 is a wasteful number, since it uses less digits than its factorization.

20004020442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707168 (or 1707162 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 20004020442 its reverse (24402040002), we get a palindrome (44406060444).

The spelling of 20004020442 in words is "twenty billion, four million, twenty thousand, four hundred forty-two".