100020544 has 56 divisors (see below), whose sum is σ = 215066880. Its totient is φ = 45878784.

The previous prime is 100020533. The next prime is 100020551. The reversal of 100020544 is 445020001.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198597 + ... + 199099.

It is an arithmetic number, because the mean of its divisors is an integer number (3840480).

Almost surely, 2^100020544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100020544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107533440).

100020544 is an abundant number, since it is smaller than the sum of its proper divisors (115046336).

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

100020544 is a wasteful number, since it uses less digits than its factorization.

100020544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767 (or 757 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 100020544 is about 10001.0271472484. The cubic root of 100020544 is about 464.1906667852.

Adding to 100020544 its reverse (445020001), we get a palindrome (545040545).

The spelling of 100020544 in words is "one hundred million, twenty thousand, five hundred forty-four".