20099983 has 2 divisors, whose sum is σ = 20099984. Its totient is φ = 20099982.

The previous prime is 20099977. The next prime is 20100023. The reversal of 20099983 is 38999002.

It is a happy number.

It is an a-pointer prime, because the next prime (20100023) can be obtained adding 20099983 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20099983 - 2¹³ = 20091791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20099903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10049991 + 10049992.

It is an arithmetic number, because the mean of its divisors is an integer number (10049992).

Almost surely, 2^20099983 is an apocalyptic number.

20099983 is a deficient number, since it is larger than the sum of its proper divisors (1).

20099983 is an equidigital number, since it uses as much as digits as its factorization.

20099983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 20099983 is about 4483.3004583677. The cubic root of 20099983 is about 271.8933360250.

The spelling of 20099983 in words is "twenty million, ninety-nine thousand, nine hundred eighty-three".