21502676674 has 4 divisors (see below), whose sum is σ = 32254015014. Its totient is φ = 10751338336.

The previous prime is 21502676659. The next prime is 21502676677. The reversal of 21502676674 is 47667620512.

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., 20633311449 + 869365225 = 143643^2 + 29485^2 .

It is not an unprimeable number, because it can be changed into a prime (21502676677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5375669167 + ... + 5375669170.

Almost surely, 2^21502676674 is an apocalyptic number.

21502676674 is a deficient number, since it is larger than the sum of its proper divisors (10751338340).

21502676674 is a wasteful number, since it uses less digits than its factorization.

21502676674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10751338339.

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 21502676674 in words is "twenty-one billion, five hundred two million, six hundred seventy-six thousand, six hundred seventy-four".