10423440203989 has 2 divisors, whose sum is σ = 10423440203990. Its totient is φ = 10423440203988.

The previous prime is 10423440203923. The next prime is 10423440204013. The reversal of 10423440203989 is 98930204432401.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10205360543889 + 218079660100 = 3194583^2 + 466990^2 .

It is a cyclic number.

It is not a de Polignac number, because 10423440203989 - 2¹⁹ = 10423439679701 is a prime.

It is a super-2 number, since 2×10423440203989² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10423440203909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5211720101994 + 5211720101995.

It is an arithmetic number, because the mean of its divisors is an integer number (5211720101995).

Almost surely, 2^{10423440203989} is an apocalyptic number.

It is an amenable number.

10423440203989 is a deficient number, since it is larger than the sum of its proper divisors (1).

10423440203989 is an equidigital number, since it uses as much as digits as its factorization.

10423440203989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 49.

The spelling of 10423440203989 in words is "ten trillion, four hundred twenty-three billion, four hundred forty million, two hundred three thousand, nine hundred eighty-nine".