1020423251523 has 8 divisors (see below), whose sum is σ = 1465223130448. Its totient is φ = 627952770144.

The previous prime is 1020423251417. The next prime is 1020423251527. The reversal of 1020423251523 is 3251523240201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1020423251523 - 2¹⁰ = 1020423250499 is a prime.

It is a super-2 number, since 2×1020423251523² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020423251527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13082349340 + ... + 13082349417.

It is an arithmetic number, because the mean of its divisors is an integer number (183152891306).

Almost surely, 2^{1020423251523} is an apocalyptic number.

1020423251523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1020423251523 is a deficient number, since it is larger than the sum of its proper divisors (444799878925).

1020423251523 is a wasteful number, since it uses less digits than its factorization.

1020423251523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26164698773.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 1020423251523 its reverse (3251523240201), we get a palindrome (4271946491724).

The spelling of 1020423251523 in words is "one trillion, twenty billion, four hundred twenty-three million, two hundred fifty-one thousand, five hundred twenty-three".