21411003042 has 96 divisors (see below), whose sum is σ = 54539896320. Its totient is φ = 5984789760.

The previous prime is 21411003041. The next prime is 21411003049. The reversal of 21411003042 is 24030011412.

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

It is not an unprimeable number, because it can be changed into a prime (21411003041) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 5678934 + ... + 5682702.

It is an arithmetic number, because the mean of its divisors is an integer number (568123920).

Almost surely, 2^21411003042 is an apocalyptic number.

21411003042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21411003042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27269948160).

21411003042 is an abundant number, since it is smaller than the sum of its proper divisors (33128893278).

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

21411003042 is a wasteful number, since it uses less digits than its factorization.

21411003042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6008 (or 6005 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21411003042 its reverse (24030011412), we get a palindrome (45441014454).

The spelling of 21411003042 in words is "twenty-one billion, four hundred eleven million, three thousand, forty-two".