2102821636824 has 48 divisors (see below), whose sum is σ = 5942756804400. Its totient is φ = 670464869184.

The previous prime is 2102821636823. The next prime is 2102821636871. The reversal of 2102821636824 is 4286361282012.

2102821636824 is a `hidden beast` number, since 2 + 1 + 0 + 2 + 8 + 2 + 1 + 636 + 8 + 2 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2102821636824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102821636823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 634908259 + ... + 634911570.

It is an arithmetic number, because the mean of its divisors is an integer number (123807433425).

Almost surely, 2^{2102821636824} is an apocalyptic number.

2102821636824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2102821636824 is an abundant number, since it is smaller than the sum of its proper divisors (3839935167576).

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

2102821636824 is a wasteful number, since it uses less digits than its factorization.

2102821636824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269819864 (or 1269819857 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 2102821636824 in words is "two trillion, one hundred two billion, eight hundred twenty-one million, six hundred thirty-six thousand, eight hundred twenty-four".