20133100987 has 2 divisors, whose sum is σ = 20133100988. Its totient is φ = 20133100986.

The previous prime is 20133100973. The next prime is 20133101033. The reversal of 20133100987 is 78900133102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20133100987 is a prime.

It is not a weakly prime, because it can be changed into another prime (20133100087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10066550493 + 10066550494.

It is an arithmetic number, because the mean of its divisors is an integer number (10066550494).

Almost surely, 2^20133100987 is an apocalyptic number.

20133100987 is a deficient number, since it is larger than the sum of its proper divisors (1).

20133100987 is an equidigital number, since it uses as much as digits as its factorization.

20133100987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The spelling of 20133100987 in words is "twenty billion, one hundred thirty-three million, one hundred thousand, nine hundred eighty-seven".