20712192 has 72 divisors (see below), whose sum is σ = 55801200. Its totient is φ = 6819840.

The previous prime is 20712187. The next prime is 20712199. The reversal of 20712192 is 29121702.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20712199) 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, 114342 + ... + 114522.

Almost surely, 2^20712192 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20712192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27900600).

20712192 is an abundant number, since it is smaller than the sum of its proper divisors (35089008).

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

20712192 is a wasteful number, since it uses less digits than its factorization.

20712192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 20712192 is about 4551.0649303213. The cubic root of 20712192 is about 274.6262338237.

Adding to 20712192 its reverse (29121702), we get a palindrome (49833894).

The spelling of 20712192 in words is "twenty million, seven hundred twelve thousand, one hundred ninety-two".