21036868869374 has 4 divisors (see below), whose sum is σ = 31555303304064. Its totient is φ = 10518434434686.

The previous prime is 21036868869343. The next prime is 21036868869377. The reversal of 21036868869374 is 47396886863012.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21036868869298 and 21036868869307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21036868869377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5259217217342 + ... + 5259217217345.

It is an arithmetic number, because the mean of its divisors is an integer number (7888825826016).

Almost surely, 2^{21036868869374} is an apocalyptic number.

21036868869374 is a deficient number, since it is larger than the sum of its proper divisors (10518434434690).

21036868869374 is a wasteful number, since it uses less digits than its factorization.

21036868869374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10518434434689.

The product of its (nonzero) digits is 501645312, while the sum is 71.

The spelling of 21036868869374 in words is "twenty-one trillion, thirty-six billion, eight hundred sixty-eight million, eight hundred sixty-nine thousand, three hundred seventy-four".