1020002431939 has 2 divisors, whose sum is σ = 1020002431940. Its totient is φ = 1020002431938.

The previous prime is 1020002431919. The next prime is 1020002431957. The reversal of 1020002431939 is 9391342000201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1020002431939 - 2⁵ = 1020002431907 is a prime.

It is a super-2 number, since 2×1020002431939² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1020002431919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510001215969 + 510001215970.

It is an arithmetic number, because the mean of its divisors is an integer number (510001215970).

Almost surely, 2^{1020002431939} is an apocalyptic number.

1020002431939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020002431939 is an equidigital number, since it uses as much as digits as its factorization.

1020002431939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The spelling of 1020002431939 in words is "one trillion, twenty billion, two million, four hundred thirty-one thousand, nine hundred thirty-nine".