20120712 has 16 divisors (see below), whose sum is σ = 50301840. Its totient is φ = 6706896.

The previous prime is 20120657. The next prime is 20120713. The reversal of 20120712 is 21702102.

It is a junction number, because it is equal to n+sod(n) for n = 20120691 and 20120700.

It is not an unprimeable number, because it can be changed into a prime (20120713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419158 + ... + 419205.

It is an arithmetic number, because the mean of its divisors is an integer number (3143865).

Almost surely, 2^20120712 is an apocalyptic number.

It is an amenable number.

20120712 is an abundant number, since it is smaller than the sum of its proper divisors (30181128).

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

20120712 is a wasteful number, since it uses less digits than its factorization.

20120712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838372 (or 838368 counting only the distinct ones).

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

The square root of 20120712 is about 4485.6116639763. The cubic root of 20120712 is about 271.9867712713.

Adding to 20120712 its reverse (21702102), we get a palindrome (41822814).

The spelling of 20120712 in words is "twenty million, one hundred twenty thousand, seven hundred twelve".