16247002381 has 4 divisors (see below), whose sum is σ = 16771099264. Its totient is φ = 15722905500.

The previous prime is 16247002333. The next prime is 16247002393. The reversal of 16247002381 is 18320074261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18320074261 = 911 ⋅20109851.

It is not a de Polignac number, because 16247002381 - 2¹³ = 16246994189 is a prime.

It is a super-2 number, since 2×16247002381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16247002081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262048395 + ... + 262048456.

It is an arithmetic number, because the mean of its divisors is an integer number (4192774816).

Almost surely, 2^16247002381 is an apocalyptic number.

It is an amenable number.

16247002381 is a deficient number, since it is larger than the sum of its proper divisors (524096883).

16247002381 is an equidigital number, since it uses as much as digits as its factorization.

16247002381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524096882.

The product of its (nonzero) digits is 16128, while the sum is 34.

The spelling of 16247002381 in words is "sixteen billion, two hundred forty-seven million, two thousand, three hundred eighty-one".