1820401385057 has 8 divisors (see below), whose sum is σ = 1824519033792. Its totient is φ = 1816284675600.

The previous prime is 1820401385051. The next prime is 1820401385059. The reversal of 1820401385057 is 7505831040281.

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 1820401385057 - 2⁶ = 1820401384993 is a prime.

It is a super-2 number, since 2×1820401385057² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1820401384999 and 1820401385017.

It is not an unprimeable number, because it can be changed into a prime (1820401385051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3720932 + ... + 4181642.

It is an arithmetic number, because the mean of its divisors is an integer number (228064879224).

Almost surely, 2^{1820401385057} is an apocalyptic number.

It is an amenable number.

1820401385057 is a deficient number, since it is larger than the sum of its proper divisors (4117648735).

1820401385057 is an equidigital number, since it uses as much as digits as its factorization.

1820401385057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469639.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 1820401385057 in words is "one trillion, eight hundred twenty billion, four hundred one million, three hundred eighty-five thousand, fifty-seven".