21713316425 has 12 divisors (see below), whose sum is σ = 26926498320. Its totient is φ = 17369371920.

The previous prime is 21713316407. The next prime is 21713316439. The reversal of 21713316425 is 52461331712.

It is not a de Polignac number, because 21713316425 - 2⁸ = 21713316169 is a prime.

It is a super-2 number, since 2×21713316425² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 464786 + ... + 509364.

It is an arithmetic number, because the mean of its divisors is an integer number (2243874860).

Almost surely, 2^21713316425 is an apocalyptic number.

21713316425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21713316425 is a deficient number, since it is larger than the sum of its proper divisors (5213181895).

21713316425 is a wasteful number, since it uses less digits than its factorization.

21713316425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64072 (or 64067 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The spelling of 21713316425 in words is "twenty-one billion, seven hundred thirteen million, three hundred sixteen thousand, four hundred twenty-five".