16920671 has 2 divisors, whose sum is σ = 16920672. Its totient is φ = 16920670.

The previous prime is 16920667. The next prime is 16920677. The reversal of 16920671 is 17602961.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (17602961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16920671 - 2² = 16920667 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16920677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8460335 + 8460336.

It is an arithmetic number, because the mean of its divisors is an integer number (8460336).

Almost surely, 2^16920671 is an apocalyptic number.

16920671 is a deficient number, since it is larger than the sum of its proper divisors (1).

16920671 is an equidigital number, since it uses as much as digits as its factorization.

16920671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 16920671 is about 4113.4743222731. The cubic root of 16920671 is about 256.7275800405.

The spelling of 16920671 in words is "sixteen million, nine hundred twenty thousand, six hundred seventy-one".