21335464874 has 4 divisors (see below), whose sum is σ = 32003197314. Its totient is φ = 10667732436.

The previous prime is 21335464853. The next prime is 21335464877. The reversal of 21335464874 is 47846453312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14821845025 + 6513619849 = 121745^2 + 80707^2 .

It is a super-2 number, since 2×21335464874² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21335464877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5333866217 + ... + 5333866220.

Almost surely, 2^21335464874 is an apocalyptic number.

21335464874 is a deficient number, since it is larger than the sum of its proper divisors (10667732440).

21335464874 is a wasteful number, since it uses less digits than its factorization.

21335464874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10667732439.

The product of its digits is 1935360, while the sum is 47.

The spelling of 21335464874 in words is "twenty-one billion, three hundred thirty-five million, four hundred sixty-four thousand, eight hundred seventy-four".