20245772 has 6 divisors (see below), whose sum is σ = 35430108. Its totient is φ = 10122884.

The previous prime is 20245751. The next prime is 20245777. The reversal of 20245772 is 27754202.

It is not an unprimeable number, because it can be changed into a prime (20245777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2530718 + ... + 2530725.

It is an arithmetic number, because the mean of its divisors is an integer number (5905018).

Almost surely, 2^20245772 is an apocalyptic number.

It is an amenable number.

20245772 is a deficient number, since it is larger than the sum of its proper divisors (15184336).

20245772 is a wasteful number, since it uses less digits than its factorization.

20245772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5061447 (or 5061445 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 20245772 is about 4499.5301976984. The cubic root of 20245772 is about 272.5491177628.

Adding to 20245772 its reverse (27754202), we get a palindrome (47999974).

The spelling of 20245772 in words is "twenty million, two hundred forty-five thousand, seven hundred seventy-two".