2021401423440 has 240 divisors, whose sum is σ = 8025860419200. Its totient is φ = 446102350848.

The previous prime is 2021401423409. The next prime is 2021401423441. The reversal of 2021401423440 is 443241041202.

2021401423440 is a `hidden beast` number, since 2 + 0 + 21 + 401 + 4 + 234 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021401423441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6768870 + ... + 7061189.

It is an arithmetic number, because the mean of its divisors is an integer number (33441085080).

Almost surely, 2^{2021401423440} is an apocalyptic number.

2021401423440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021401423440 is an abundant number, since it is smaller than the sum of its proper divisors (6004458995760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021401423440 is a wasteful number, since it uses less digits than its factorization.

2021401423440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13830114 (or 13830105 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 2021401423440 its reverse (443241041202), we get a palindrome (2464642464642).

The spelling of 2021401423440 in words is "two trillion, twenty-one billion, four hundred one million, four hundred twenty-three thousand, four hundred forty".