21162663351 has 24 divisors (see below), whose sum is σ = 31658425344. Its totient is φ = 13613760720.

The previous prime is 21162663343. The next prime is 21162663373. The reversal of 21162663351 is 15336626112.

21162663351 is a `hidden beast` number, since 2 + 1 + 16 + 2 + 6 + 633 + 5 + 1 = 666.

It is not a de Polignac number, because 21162663351 - 2³ = 21162663343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21162663341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 322291 + ... + 382356.

It is an arithmetic number, because the mean of its divisors is an integer number (1319101056).

Almost surely, 2^21162663351 is an apocalyptic number.

21162663351 is a deficient number, since it is larger than the sum of its proper divisors (10495761993).

21162663351 is a wasteful number, since it uses less digits than its factorization.

21162663351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704771 (or 704768 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The spelling of 21162663351 in words is "twenty-one billion, one hundred sixty-two million, six hundred sixty-three thousand, three hundred fifty-one".