21275527342 has 8 divisors (see below), whose sum is σ = 31913994600. Its totient is φ = 10637529144.

The previous prime is 21275527337. The next prime is 21275527391. The reversal of 21275527342 is 24372557212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21275527295 and 21275527304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36409 + ... + 209467.

It is an arithmetic number, because the mean of its divisors is an integer number (3989249325).

Almost surely, 2^21275527342 is an apocalyptic number.

21275527342 is a deficient number, since it is larger than the sum of its proper divisors (10638467258).

21275527342 is a wasteful number, since it uses less digits than its factorization.

21275527342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234530.

The product of its digits is 235200, while the sum is 40.

The spelling of 21275527342 in words is "twenty-one billion, two hundred seventy-five million, five hundred twenty-seven thousand, three hundred forty-two".