20462993 has 2 divisors, whose sum is σ = 20462994. Its totient is φ = 20462992.

The previous prime is 20462983. The next prime is 20463017. The reversal of 20462993 is 39926402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14227984 + 6235009 = 3772^2 + 2497^2 .

It is a cyclic number.

It is not a de Polignac number, because 20462993 - 2¹² = 20458897 is a prime.

It is not a weakly prime, because it can be changed into another prime (20462933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10231496 + 10231497.

It is an arithmetic number, because the mean of its divisors is an integer number (10231497).

Almost surely, 2^20462993 is an apocalyptic number.

It is an amenable number.

20462993 is a deficient number, since it is larger than the sum of its proper divisors (1).

20462993 is an equidigital number, since it uses as much as digits as its factorization.

20462993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 20462993 is about 4523.6039835512. The cubic root of 20462993 is about 273.5203972636.

The spelling of 20462993 in words is "twenty million, four hundred sixty-two thousand, nine hundred ninety-three".