20100012 has 12 divisors (see below), whose sum is σ = 46900056. Its totient is φ = 6700000.

The previous prime is 20099983. The next prime is 20100023. The reversal of 20100012 is 21000102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837489 + ... + 837512.

It is an arithmetic number, because the mean of its divisors is an integer number (3908338).

Almost surely, 2^20100012 is an apocalyptic number.

It is an amenable number.

20100012 is an abundant number, since it is smaller than the sum of its proper divisors (26800044).

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

20100012 is a wasteful number, since it uses less digits than its factorization.

20100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675008 (or 1675006 counting only the distinct ones).

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

The square root of 20100012 is about 4483.3036925910. The cubic root of 20100012 is about 271.8934667863.

Adding to 20100012 its reverse (21000102), we get a palindrome (41100114).

The spelling of 20100012 in words is "twenty million, one hundred thousand, twelve".