20725012 has 24 divisors (see below), whose sum is σ = 45218880. Its totient is φ = 8074560.

The previous prime is 20725009. The next prime is 20725013. The reversal of 20725012 is 21052702.

It is a super-2 number, since 2×20725012² = 859052244800288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20725013) 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, 33337 + ... + 33952.

It is an arithmetic number, because the mean of its divisors is an integer number (1884120).

Almost surely, 2^20725012 is an apocalyptic number.

20725012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20725012 is an abundant number, since it is smaller than the sum of its proper divisors (24493868).

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

20725012 is a wasteful number, since it uses less digits than its factorization.

20725012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67311 (or 67309 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 20725012 is about 4552.4731740011. The cubic root of 20725012 is about 274.6828829409.

Adding to 20725012 its reverse (21052702), we get a palindrome (41777714).

The spelling of 20725012 in words is "twenty million, seven hundred twenty-five thousand, twelve".