102020634 has 56 divisors (see below), whose sum is σ = 231366240. Its totient is φ = 33722568.

The previous prime is 102020629. The next prime is 102020647. The reversal of 102020634 is 436020201.

It is a happy number.

102020634 is a `hidden beast` number, since 10 + 2 + 0 + 20 + 634 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 243277 + ... + 243695.

It is an arithmetic number, because the mean of its divisors is an integer number (4131540).

Almost surely, 2^102020634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102020634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115683120).

102020634 is an abundant number, since it is smaller than the sum of its proper divisors (129345606).

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

102020634 is an equidigital number, since it uses as much as digits as its factorization.

102020634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 591 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 102020634 is about 10100.5264219248. The cubic root of 102020634 is about 467.2643768652.

Adding to 102020634 its reverse (436020201), we get a palindrome (538040835).

The spelling of 102020634 in words is "one hundred two million, twenty thousand, six hundred thirty-four".