1020343423023 has 20 divisors (see below), whose sum is σ = 1524379955208. Its totient is φ = 680156099280.

The previous prime is 1020343423019. The next prime is 1020343423049. The reversal of 1020343423023 is 3203243430201.

1020343423023 is a `hidden beast` number, since 1 + 0 + 203 + 434 + 2 + 3 + 0 + 23 = 666.

It is not a de Polignac number, because 1020343423023 - 2² = 1020343423019 is a prime.

It is a super-2 number, since 2×1020343423023² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020343423013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 91813 + ... + 1431473.

Almost surely, 2^{1020343423023} is an apocalyptic number.

1020343423023 is a deficient number, since it is larger than the sum of its proper divisors (504036532185).

1020343423023 is an equidigital number, since it uses as much as digits as its factorization.

1020343423023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349076 (or 1349067 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 1020343423023 its reverse (3203243430201), we get a palindrome (4223586853224).

The spelling of 1020343423023 in words is "one trillion, twenty billion, three hundred forty-three million, four hundred twenty-three thousand, twenty-three".