20719242 has 12 divisors (see below), whose sum is σ = 44891730. Its totient is φ = 6906408.

The previous prime is 20719217. The next prime is 20719247. The reversal of 20719242 is 24291702.

It can be written as a sum of positive squares in only one way, i.e., 18584721 + 2134521 = 4311^2 + 1461^2 .

It is not an unprimeable number, because it can be changed into a prime (20719247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 575517 + ... + 575552.

Almost surely, 2^20719242 is an apocalyptic number.

20719242 is an abundant number, since it is smaller than the sum of its proper divisors (24172488).

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

20719242 is a wasteful number, since it uses less digits than its factorization.

20719242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151077 (or 1151074 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 20719242 is about 4551.8394084150. The cubic root of 20719242 is about 274.6573893113.

The spelling of 20719242 in words is "twenty million, seven hundred nineteen thousand, two hundred forty-two".