2117430816381 has 24 divisors (see below), whose sum is σ = 3072205456320. Its totient is φ = 1405311296256.

The previous prime is 2117430816379. The next prime is 2117430816383. The reversal of 2117430816381 is 1836180347112.

2117430816381 is a `hidden beast` number, since 2 + 1 + 1 + 7 + 4 + 3 + 0 + 8 + 1 + 638 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (2117430816379) and next prime (2117430816383).

It is not a de Polignac number, because 2117430816381 - 2¹ = 2117430816379 is a prime.

It is a super-2 number, since 2×2117430816381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117430816383) 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, 1808365 + ... + 2739533.

It is an arithmetic number, because the mean of its divisors is an integer number (128008560680).

Almost surely, 2^{2117430816381} is an apocalyptic number.

It is an amenable number.

2117430816381 is a deficient number, since it is larger than the sum of its proper divisors (954774639939).

2117430816381 is a wasteful number, since it uses less digits than its factorization.

2117430816381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932305 (or 932302 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 2117430816381 in words is "two trillion, one hundred seventeen billion, four hundred thirty million, eight hundred sixteen thousand, three hundred eighty-one".