21491762314 has 8 divisors (see below), whose sum is σ = 35168338368. Its totient is φ = 9768982860.

The previous prime is 21491762291. The next prime is 21491762323. The reversal of 21491762314 is 41326719412.

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

It is a super-2 number, since 2×21491762314² (a number of 21 digits) contains 22 as substring.

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, 488449122 + ... + 488449165.

It is an arithmetic number, because the mean of its divisors is an integer number (4396042296).

Almost surely, 2^21491762314 is an apocalyptic number.

21491762314 is a deficient number, since it is larger than the sum of its proper divisors (13676576054).

21491762314 is a wasteful number, since it uses less digits than its factorization.

21491762314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976898300.

The product of its digits is 72576, while the sum is 40.

The spelling of 21491762314 in words is "twenty-one billion, four hundred ninety-one million, seven hundred sixty-two thousand, three hundred fourteen".