1835173405021 has 16 divisors (see below), whose sum is σ = 2005051989888. Its totient is φ = 1665803059200.

The previous prime is 1835173405003. The next prime is 1835173405027. The reversal of 1835173405021 is 1205043715381.

It is a cyclic number.

It is not a de Polignac number, because 1835173405021 - 2¹⁹ = 1835172880733 is a prime.

It is a super-2 number, since 2×1835173405021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1835173405027) 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 15 ways as a sum of consecutive naturals, for example, 56876125 + ... + 56908381.

It is an arithmetic number, because the mean of its divisors is an integer number (125315749368).

Almost surely, 2^{1835173405021} is an apocalyptic number.

1835173405021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1835173405021 is a deficient number, since it is larger than the sum of its proper divisors (169878584867).

1835173405021 is a wasteful number, since it uses less digits than its factorization.

1835173405021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39972.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 1835173405021 in words is "one trillion, eight hundred thirty-five billion, one hundred seventy-three million, four hundred five thousand, twenty-one".