21710265470 has 32 divisors (see below), whose sum is σ = 40101427296. Its totient is φ = 8457523200.

The previous prime is 21710265407. The next prime is 21710265487. The reversal of 21710265470 is 7456201712.

It is a self number, because there is not a number n which added to its sum of digits gives 21710265470.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190685 + ... + 282455.

It is an arithmetic number, because the mean of its divisors is an integer number (1253169603).

Almost surely, 2^21710265470 is an apocalyptic number.

21710265470 is a deficient number, since it is larger than the sum of its proper divisors (18391161826).

21710265470 is a wasteful number, since it uses less digits than its factorization.

21710265470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92396.

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 21710265470 in words is "twenty-one billion, seven hundred ten million, two hundred sixty-five thousand, four hundred seventy".