21407231013 has 8 divisors (see below), whose sum is σ = 32620542528. Its totient is φ = 12232703424.

The previous prime is 21407231003. The next prime is 21407231029. The reversal of 21407231013 is 31013270412.

It is a happy number.

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

It is not a de Polignac number, because 21407231013 - 2¹⁰ = 21407229989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21407231003) 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, 509695956 + ... + 509695997.

It is an arithmetic number, because the mean of its divisors is an integer number (4077567816).

Almost surely, 2^21407231013 is an apocalyptic number.

It is an amenable number.

21407231013 is a deficient number, since it is larger than the sum of its proper divisors (11213311515).

21407231013 is a wasteful number, since it uses less digits than its factorization.

21407231013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019391963.

The product of its (nonzero) digits is 1008, while the sum is 24.

The spelling of 21407231013 in words is "twenty-one billion, four hundred seven million, two hundred thirty-one thousand, thirteen".