21400112140 has 48 divisors (see below), whose sum is σ = 49411805184. Its totient is φ = 7720574400.

The previous prime is 21400112131. The next prime is 21400112189. The reversal of 21400112140 is 4121100412.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355026 + ... + 410905.

It is an arithmetic number, because the mean of its divisors is an integer number (1029412608).

Almost surely, 2^21400112140 is an apocalyptic number.

21400112140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21400112140 is an abundant number, since it is smaller than the sum of its proper divisors (28011693044).

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

21400112140 is a wasteful number, since it uses less digits than its factorization.

21400112140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766078 (or 766076 counting only the distinct ones).

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

Adding to 21400112140 its reverse (4121100412), we get a palindrome (25521212552).

The spelling of 21400112140 in words is "twenty-one billion, four hundred million, one hundred twelve thousand, one hundred forty".