21141020140 has 24 divisors (see below), whose sum is σ = 47007680832. Its totient is φ = 7958972160.

The previous prime is 21141020113. The next prime is 21141020177. The reversal of 21141020140 is 4102014112.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 31089396 + ... + 31090075.

It is an arithmetic number, because the mean of its divisors is an integer number (1958653368).

Almost surely, 2^21141020140 is an apocalyptic number.

21141020140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21141020140 is an abundant number, since it is smaller than the sum of its proper divisors (25866660692).

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

21141020140 is a wasteful number, since it uses less digits than its factorization.

21141020140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62179497 (or 62179495 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21141020140 its reverse (4102014112), we get a palindrome (25243034252).

The spelling of 21141020140 in words is "twenty-one billion, one hundred forty-one million, twenty thousand, one hundred forty".