1000020423401 has 4 divisors (see below), whose sum is σ = 1000024942404. Its totient is φ = 1000015904400.

The previous prime is 1000020423383. The next prime is 1000020423469. The reversal of 1000020423401 is 1043240200001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 860768306176 + 139252117225 = 927776^2 + 373165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000020423401 is a prime.

It is a super-3 number, since 3×1000020423401³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1000020423401.

It is not an unprimeable number, because it can be changed into a prime (1000020423601) 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 3 ways as a sum of consecutive naturals, for example, 1909490 + ... + 2376171.

It is an arithmetic number, because the mean of its divisors is an integer number (250006235601).

Almost surely, 2^{1000020423401} is an apocalyptic number.

It is an amenable number.

1000020423401 is a deficient number, since it is larger than the sum of its proper divisors (4519003).

1000020423401 is an equidigital number, since it uses as much as digits as its factorization.

1000020423401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4519002.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 1000020423401 its reverse (1043240200001), we get a palindrome (2043260623402).

The spelling of 1000020423401 in words is "one trillion, twenty million, four hundred twenty-three thousand, four hundred one".