21013041140 has 48 divisors (see below), whose sum is σ = 54310634112. Its totient is φ = 6650280576.

The previous prime is 21013041139. The next prime is 21013041143. The reversal of 21013041140 is 4114031012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013041143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5770994 + ... + 5774633.

It is an arithmetic number, because the mean of its divisors is an integer number (1131471544).

Almost surely, 2^21013041140 is an apocalyptic number.

21013041140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21013041140 is an abundant number, since it is smaller than the sum of its proper divisors (33297592972).

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

21013041140 is a wasteful number, since it uses less digits than its factorization.

21013041140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11545656 (or 11545654 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21013041140 its reverse (4114031012), we get a palindrome (25127072152).

The spelling of 21013041140 in words is "twenty-one billion, thirteen million, forty-one thousand, one hundred forty".