20100102 has 32 divisors (see below), whose sum is σ = 45045504. Its totient is φ = 5925600.

The previous prime is 20100097. The next prime is 20100149.

It is a happy number.

20100102 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1674 + ... + 6557.

It is an arithmetic number, because the mean of its divisors is an integer number (1407672).

Almost surely, 2^20100102 is an apocalyptic number.

20100102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20100102 is an abundant number, since it is smaller than the sum of its proper divisors (24945402).

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

20100102 is a wasteful number, since it uses less digits than its factorization.

20100102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8284.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 20100102 is about 4483.3137298208. The cubic root of 20100102 is about 271.8938725966.

It can be divided in two parts, 20100 and 102, that added together give a palindrome (20202).

The spelling of 20100102 in words is "twenty million, one hundred thousand, one hundred two".