102020320404 has 18 divisors (see below), whose sum is σ = 257884698890. Its totient is φ = 34006773456.

The previous prime is 102020320397. The next prime is 102020320429. The reversal of 102020320404 is 404023020201.

It can be written as a sum of positive squares in only one way, i.e., 60392079504 + 41628240900 = 245748^2 + 204030^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1416948859 + ... + 1416948930.

Almost surely, 2^102020320404 is an apocalyptic number.

It is an amenable number.

102020320404 is an abundant number, since it is smaller than the sum of its proper divisors (155864378486).

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

102020320404 is a wasteful number, since it uses less digits than its factorization.

102020320404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833897799 (or 2833897794 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 102020320404 its reverse (404023020201), we get a palindrome (506043340605).

The spelling of 102020320404 in words is "one hundred two billion, twenty million, three hundred twenty thousand, four hundred four".