1020440023401 has 8 divisors (see below), whose sum is σ = 1361833802784. Its totient is φ = 679669796480.

The previous prime is 1020440023363. The next prime is 1020440023429. The reversal of 1020440023401 is 1043200440201.

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

It is a cyclic number.

It is not a de Polignac number, because 1020440023401 - 2³¹ = 1018292539753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020440023451) 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, 155884296 + ... + 155890841.

It is an arithmetic number, because the mean of its divisors is an integer number (170229225348).

Almost surely, 2^{1020440023401} is an apocalyptic number.

It is an amenable number.

1020440023401 is a deficient number, since it is larger than the sum of its proper divisors (341393779383).

1020440023401 is a wasteful number, since it uses less digits than its factorization.

1020440023401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311776231.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 1020440023401 its reverse (1043200440201), we get a palindrome (2063640463602).

The spelling of 1020440023401 in words is "one trillion, twenty billion, four hundred forty million, twenty-three thousand, four hundred one".