21237460255 has 8 divisors (see below), whose sum is σ = 27801766224. Its totient is φ = 15445425600.

The previous prime is 21237460247. The next prime is 21237460267. The reversal of 21237460255 is 55206473212.

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

It is not a de Polignac number, because 21237460255 - 2³ = 21237460247 is a prime.

It is a Duffinian number.

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, 193067766 + ... + 193067875.

It is an arithmetic number, because the mean of its divisors is an integer number (3475220778).

Almost surely, 2^21237460255 is an apocalyptic number.

21237460255 is a deficient number, since it is larger than the sum of its proper divisors (6564305969).

21237460255 is a wasteful number, since it uses less digits than its factorization.

21237460255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386135657.

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 21237460255 in words is "twenty-one billion, two hundred thirty-seven million, four hundred sixty thousand, two hundred fifty-five".