20030820287 has 2 divisors, whose sum is σ = 20030820288. Its totient is φ = 20030820286.

The previous prime is 20030820269. The next prime is 20030820323. The reversal of 20030820287 is 78202803002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20030820287 - 2⁶ = 20030820223 is a prime.

It is a super-2 number, since 2×20030820287² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20030820787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10015410143 + 10015410144.

It is an arithmetic number, because the mean of its divisors is an integer number (10015410144).

Almost surely, 2^20030820287 is an apocalyptic number.

20030820287 is a deficient number, since it is larger than the sum of its proper divisors (1).

20030820287 is an equidigital number, since it uses as much as digits as its factorization.

20030820287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 32.

The spelling of 20030820287 in words is "twenty billion, thirty million, eight hundred twenty thousand, two hundred eighty-seven".