16500070431 has 12 divisors (see below), whose sum is σ = 25666776408. Its totient is φ = 10153889424.

The previous prime is 16500070427. The next prime is 16500070481. The reversal of 16500070431 is 13407000561.

16500070431 is a `hidden beast` number, since 1 + 650 + 0 + 0 + 7 + 0 + 4 + 3 + 1 = 666.

It is not a de Polignac number, because 16500070431 - 2² = 16500070427 is a prime.

It is a super-2 number, since 2×16500070431² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16500070395 and 16500070404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16500070481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70513005 + ... + 70513238.

It is an arithmetic number, because the mean of its divisors is an integer number (2138898034).

Almost surely, 2^16500070431 is an apocalyptic number.

16500070431 is a deficient number, since it is larger than the sum of its proper divisors (9166705977).

16500070431 is a wasteful number, since it uses less digits than its factorization.

16500070431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141026262 (or 141026259 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

Adding to 16500070431 its reverse (13407000561), we get a palindrome (29907070992).

The spelling of 16500070431 in words is "sixteen billion, five hundred million, seventy thousand, four hundred thirty-one".