21541141004 has 48 divisors (see below), whose sum is σ = 39599013888. Its totient is φ = 10233651648.

The previous prime is 21541141001. The next prime is 21541141033. The reversal of 21541141004 is 40014114512.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (21541141001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9759269 + ... + 9761475.

It is an arithmetic number, because the mean of its divisors is an integer number (824979456).

Almost surely, 2^21541141004 is an apocalyptic number.

It is an amenable number.

21541141004 is a deficient number, since it is larger than the sum of its proper divisors (18057872884).

21541141004 is a wasteful number, since it uses less digits than its factorization.

21541141004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2894 (or 2892 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 21541141004 its reverse (40014114512), we get a palindrome (61555255516).

The spelling of 21541141004 in words is "twenty-one billion, five hundred forty-one million, one hundred forty-one thousand, four".