21279460213 has 8 divisors (see below), whose sum is σ = 23222458656. Its totient is φ = 19337878800.

The previous prime is 21279460177. The next prime is 21279460243. The reversal of 21279460213 is 31206497212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21279460213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21279460243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322731 + ... + 383032.

It is an arithmetic number, because the mean of its divisors is an integer number (2902807332).

Almost surely, 2^21279460213 is an apocalyptic number.

It is an amenable number.

21279460213 is a deficient number, since it is larger than the sum of its proper divisors (1942998443).

21279460213 is a wasteful number, since it uses less digits than its factorization.

21279460213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708515.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 21279460213 in words is "twenty-one billion, two hundred seventy-nine million, four hundred sixty thousand, two hundred thirteen".