16316820217831 has 16 divisors (see below), whose sum is σ = 18800498663424. Its totient is φ = 13871386607904.

The previous prime is 16316820217787. The next prime is 16316820217849. The reversal of 16316820217831 is 13871202861361.

It is not a de Polignac number, because 16316820217831 - 2¹⁷ = 16316820086759 is a prime.

It is a super-2 number, since 2×16316820217831² (a number of 27 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 (16316820227831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17680 + ... + 5712613.

It is an arithmetic number, because the mean of its divisors is an integer number (1175031166464).

Almost surely, 2^{16316820217831} is an apocalyptic number.

16316820217831 is a deficient number, since it is larger than the sum of its proper divisors (2483678445593).

16316820217831 is a wasteful number, since it uses less digits than its factorization.

16316820217831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5733630.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 16316820217831 in words is "sixteen trillion, three hundred sixteen billion, eight hundred twenty million, two hundred seventeen thousand, eight hundred thirty-one".