20047212 has 18 divisors (see below), whose sum is σ = 50674988. Its totient is φ = 6682392.

The previous prime is 20047201. The next prime is 20047241. The reversal of 20047212 is 21274002.

It is a tau number, because it is divible by the number of its divisors (18).

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

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 5 ways as a sum of consecutive naturals, for example, 278398 + ... + 278469.

Almost surely, 2^20047212 is an apocalyptic number.

It is an amenable number.

20047212 is an abundant number, since it is smaller than the sum of its proper divisors (30627776).

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

20047212 is a wasteful number, since it uses less digits than its factorization.

20047212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556877 (or 556872 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 20047212 is about 4477.4113056542. The cubic root of 20047212 is about 271.6551822881.

It can be divided in two parts, 2004 and 7212, that added together give a square (9216 = 96²).

The spelling of 20047212 in words is "twenty million, forty-seven thousand, two hundred twelve".