21246710434 has 8 divisors (see below), whose sum is σ = 32031843228. Its totient is φ = 10569429360.

The previous prime is 21246710431. The next prime is 21246710447. The reversal of 21246710434 is 43401764212.

It can be written as a sum of positive squares in 2 ways, for example, as 21099015025 + 147695409 = 145255^2 + 12153^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21246710434.

It is not an unprimeable number, because it can be changed into a prime (21246710431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26962437 + ... + 26963224.

Almost surely, 2^21246710434 is an apocalyptic number.

21246710434 is a deficient number, since it is larger than the sum of its proper divisors (10785132794).

21246710434 is a wasteful number, since it uses less digits than its factorization.

21246710434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53925860.

The product of its (nonzero) digits is 32256, while the sum is 34.

The spelling of 21246710434 in words is "twenty-one billion, two hundred forty-six million, seven hundred ten thousand, four hundred thirty-four".