20245766 has 4 divisors (see below), whose sum is σ = 30368652. Its totient is φ = 10122882.

The previous prime is 20245751. The next prime is 20245777. The reversal of 20245766 is 66754202.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5061440 + ... + 5061443.

It is an arithmetic number, because the mean of its divisors is an integer number (7592163).

Almost surely, 2^20245766 is an apocalyptic number.

20245766 is a deficient number, since it is larger than the sum of its proper divisors (10122886).

20245766 is a wasteful number, since it uses less digits than its factorization.

20245766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10122885.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 20245766 is about 4499.5295309621. The cubic root of 20245766 is about 272.5490908387.

Adding to 20245766 its reverse (66754202), we get a palindrome (86999968).

The spelling of 20245766 in words is "twenty million, two hundred forty-five thousand, seven hundred sixty-six".