21402141140 has 48 divisors (see below), whose sum is σ = 45112806144. Its totient is φ = 8528860800.

The previous prime is 21402141107. The next prime is 21402141149. The reversal of 21402141140 is 4114120412.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21402141149) 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 15 ways as a sum of consecutive naturals, for example, 8368742 + ... + 8371298.

It is an arithmetic number, because the mean of its divisors is an integer number (939850128).

Almost surely, 2^21402141140 is an apocalyptic number.

21402141140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21402141140 is an abundant number, since it is smaller than the sum of its proper divisors (23710665004).

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

21402141140 is a wasteful number, since it uses less digits than its factorization.

21402141140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968 (or 3966 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21402141140 its reverse (4114120412), we get a palindrome (25516261552).

The spelling of 21402141140 in words is "twenty-one billion, four hundred two million, one hundred forty-one thousand, one hundred forty".