21401325276 has 24 divisors (see below), whose sum is σ = 49944030864. Its totient is φ = 7132688640.

The previous prime is 21401325251. The next prime is 21401325287. The reversal of 21401325276 is 67252310412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51645 + ... + 213236.

It is an arithmetic number, because the mean of its divisors is an integer number (2081001286).

Almost surely, 2^21401325276 is an apocalyptic number.

It is an amenable number.

21401325276 is an abundant number, since it is smaller than the sum of its proper divisors (28542705588).

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

21401325276 is a wasteful number, since it uses less digits than its factorization.

21401325276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271621 (or 271619 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

Adding to 21401325276 its reverse (67252310412), we get a palindrome (88653635688).

The spelling of 21401325276 in words is "twenty-one billion, four hundred one million, three hundred twenty-five thousand, two hundred seventy-six".