21401140329 has 20 divisors (see below), whose sum is σ = 31980009600. Its totient is φ = 14262783480.

The previous prime is 21401140309. The next prime is 21401140357. The reversal of 21401140329 is 92304110412.

It is a happy number.

It is not a de Polignac number, because 21401140329 - 2⁹ = 21401139817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21401140309) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 217072 + ... + 299870.

It is an arithmetic number, because the mean of its divisors is an integer number (1599000480).

Almost surely, 2^21401140329 is an apocalyptic number.

It is an amenable number.

21401140329 is a deficient number, since it is larger than the sum of its proper divisors (10578869271).

21401140329 is an equidigital number, since it uses as much as digits as its factorization.

21401140329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86002 (or 85993 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The spelling of 21401140329 in words is "twenty-one billion, four hundred one million, one hundred forty thousand, three hundred twenty-nine".