102020823 has 32 divisors (see below), whose sum is σ = 161395200. Its totient is φ = 63504000.

The previous prime is 102020819. The next prime is 102020873. The reversal of 102020823 is 328020201.

It is a happy number.

It is not a de Polignac number, because 102020823 - 2² = 102020819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102020796 and 102020805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020873) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35023 + ... + 37823.

It is an arithmetic number, because the mean of its divisors is an integer number (5043600).

Almost surely, 2^102020823 is an apocalyptic number.

102020823 is a deficient number, since it is larger than the sum of its proper divisors (59374377).

102020823 is a wasteful number, since it uses less digits than its factorization.

102020823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900 (or 2894 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 102020823 is about 10100.5357778684. The cubic root of 102020823 is about 467.2646654111.

The spelling of 102020823 in words is "one hundred two million, twenty thousand, eight hundred twenty-three".