21713631434 has 8 divisors (see below), whose sum is σ = 35531396928. Its totient is φ = 9869832460.

The previous prime is 21713631389. The next prime is 21713631481. The reversal of 21713631434 is 43413631712.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21713631394 and 21713631403.

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, 493491602 + ... + 493491645.

It is an arithmetic number, because the mean of its divisors is an integer number (4441424616).

Almost surely, 2^21713631434 is an apocalyptic number.

21713631434 is a deficient number, since it is larger than the sum of its proper divisors (13817765494).

21713631434 is a wasteful number, since it uses less digits than its factorization.

21713631434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986983260.

The product of its digits is 36288, while the sum is 35.

The spelling of 21713631434 in words is "twenty-one billion, seven hundred thirteen million, six hundred thirty-one thousand, four hundred thirty-four".