20212104 has 32 divisors (see below), whose sum is σ = 55124640. Its totient is φ = 6124800.

The previous prime is 20212103. The next prime is 20212111. The reversal of 20212104 is 40121202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 20212104.

It is not an unprimeable number, because it can be changed into a prime (20212103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38017 + ... + 38544.

It is an arithmetic number, because the mean of its divisors is an integer number (1722645).

Almost surely, 2^20212104 is an apocalyptic number.

20212104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20212104 is an abundant number, since it is smaller than the sum of its proper divisors (34912536).

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

20212104 is a wasteful number, since it uses less digits than its factorization.

20212104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76581 (or 76577 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 20212104 is about 4495.7873615197. The cubic root of 20212104 is about 272.3979541032.

Adding to 20212104 its reverse (40121202), we get a palindrome (60333306).

The spelling of 20212104 in words is "twenty million, two hundred twelve thousand, one hundred four".