1020402423 has 6 divisors (see below), whose sum is σ = 1473914624. Its totient is φ = 680268276.

The previous prime is 1020402421. The next prime is 1020402437. The reversal of 1020402423 is 3242040201.

It is not a de Polignac number, because 1020402423 - 2¹ = 1020402421 is a prime.

It is a super-2 number, since 2×1020402423² = 2082442209728541858, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020402396 and 1020402405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020402421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56689015 + ... + 56689032.

Almost surely, 2^1020402423 is an apocalyptic number.

1020402423 is a deficient number, since it is larger than the sum of its proper divisors (453512201).

1020402423 is a wasteful number, since it uses less digits than its factorization.

1020402423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113378053 (or 113378050 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1020402423 is about 31943.7384005066. The cubic root of 1020402423 is about 1006.7550738963.

Adding to 1020402423 its reverse (3242040201), we get a palindrome (4262442624).

The spelling of 1020402423 in words is "one billion, twenty million, four hundred two thousand, four hundred twenty-three".