21715745462 has 8 divisors (see below), whose sum is σ = 32574654792. Its totient is φ = 10857527200.

The previous prime is 21715745459. The next prime is 21715745521. The reversal of 21715745462 is 26454751712.

It is a happy number.

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

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, 85364 + ... + 225207.

It is an arithmetic number, because the mean of its divisors is an integer number (4071831849).

Almost surely, 2^21715745462 is an apocalyptic number.

21715745462 is a deficient number, since it is larger than the sum of its proper divisors (10858909330).

21715745462 is a wasteful number, since it uses less digits than its factorization.

21715745462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345534.

The product of its digits is 470400, while the sum is 44.

The spelling of 21715745462 in words is "twenty-one billion, seven hundred fifteen million, seven hundred forty-five thousand, four hundred sixty-two".