16986925949 has 4 divisors (see below), whose sum is σ = 19413629664. Its totient is φ = 14560222236.

The previous prime is 16986925937. The next prime is 16986925973. The reversal of 16986925949 is 94952968961.

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.

It is not a de Polignac number, because 16986925949 - 2⁸ = 16986925693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16986921949) 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, 1213351847 + ... + 1213351860.

It is an arithmetic number, because the mean of its divisors is an integer number (4853407416).

Almost surely, 2^16986925949 is an apocalyptic number.

It is an amenable number.

16986925949 is a deficient number, since it is larger than the sum of its proper divisors (2426703715).

16986925949 is an equidigital number, since it uses as much as digits as its factorization.

16986925949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426703714.

The product of its digits is 75582720, while the sum is 68.

The spelling of 16986925949 in words is "sixteen billion, nine hundred eighty-six million, nine hundred twenty-five thousand, nine hundred forty-nine".