12920016 has 20 divisors (see below), whose sum is σ = 33376832. Its totient is φ = 4306656.

The previous prime is 12920009. The next prime is 12920023. The reversal of 12920016 is 61002921.

It is an interprime number because it is at equal distance from previous prime (12920009) and next prime (12920023).

It is a junction number, because it is equal to n+sod(n) for n = 12919974 and 12920001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134536 + ... + 134631.

Almost surely, 2^12920016 is an apocalyptic number.

12920016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12920016 is an abundant number, since it is smaller than the sum of its proper divisors (20456816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12920016 is a wasteful number, since it uses less digits than its factorization.

12920016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269178 (or 269172 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 12920016 is about 3594.4423767811. The cubic root of 12920016 is about 234.6502477895.

Adding to 12920016 its reverse (61002921), we get a palindrome (73922937).

The spelling of 12920016 in words is "twelve million, nine hundred twenty thousand, sixteen".