21014131240 has 32 divisors (see below), whose sum is σ = 49337527680. Its totient is φ = 8040188992.

The previous prime is 21014131213. The next prime is 21014131331. The reversal of 21014131240 is 4213141012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11419804 + ... + 11421643.

It is an arithmetic number, because the mean of its divisors is an integer number (1541797740).

Almost surely, 2^21014131240 is an apocalyptic number.

21014131240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21014131240 is an abundant number, since it is smaller than the sum of its proper divisors (28323396440).

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

21014131240 is a wasteful number, since it uses less digits than its factorization.

21014131240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22841481 (or 22841477 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21014131240 its reverse (4213141012), we get a palindrome (25227272252).

The spelling of 21014131240 in words is "twenty-one billion, fourteen million, one hundred thirty-one thousand, two hundred forty".