20071212 has 24 divisors (see below), whose sum is σ = 53523456. Its totient is φ = 5734608.

The previous prime is 20071211. The next prime is 20071213. The reversal of 20071212 is 21217002.

It is an interprime number because it is at equal distance from previous prime (20071211) and next prime (20071213).

It is a super-2 number, since 2×20071212² = 805707102297888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20071191 and 20071200.

It is not an unprimeable number, because it can be changed into a prime (20071211) 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, 119388 + ... + 119555.

It is an arithmetic number, because the mean of its divisors is an integer number (2230144).

Almost surely, 2^20071212 is an apocalyptic number.

It is an amenable number.

20071212 is an abundant number, since it is smaller than the sum of its proper divisors (33452244).

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

20071212 is a wasteful number, since it uses less digits than its factorization.

20071212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238957 (or 238955 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 20071212 is about 4480.0906240834. The cubic root of 20071212 is about 271.7635452258.

Adding to 20071212 its reverse (21217002), we get a palindrome (41288214).

The spelling of 20071212 in words is "twenty million, seventy-one thousand, two hundred twelve".