21345675074 has 8 divisors (see below), whose sum is σ = 32019146940. Its totient is φ = 10672626096.

The previous prime is 21345675049. The next prime is 21345675083. The reversal of 21345675074 is 47057654312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13054662049 + 8291013025 = 114257^2 + 91055^2 .

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

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, 102452 + ... + 230624.

Almost surely, 2^21345675074 is an apocalyptic number.

21345675074 is a deficient number, since it is larger than the sum of its proper divisors (10673471866).

21345675074 is a wasteful number, since it uses less digits than its factorization.

21345675074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211444.

The product of its (nonzero) digits is 705600, while the sum is 44.

The spelling of 21345675074 in words is "twenty-one billion, three hundred forty-five million, six hundred seventy-five thousand, seventy-four".