16920765 has 16 divisors (see below), whose sum is σ = 30081600. Its totient is φ = 9024336.

The previous prime is 16920751. The next prime is 16920793. The reversal of 16920765 is 56702961.

It is not a de Polignac number, because 16920765 - 2⁴ = 16920749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62535 + ... + 62804.

It is an arithmetic number, because the mean of its divisors is an integer number (1880100).

Almost surely, 2^16920765 is an apocalyptic number.

16920765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16920765 is a deficient number, since it is larger than the sum of its proper divisors (13160835).

16920765 is a wasteful number, since it uses less digits than its factorization.

16920765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125353 (or 125347 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 16920765 is about 4113.4857481217. The cubic root of 16920765 is about 256.7280554422.

The spelling of 16920765 in words is "sixteen million, nine hundred twenty thousand, seven hundred sixty-five".