20248747 has 4 divisors (see below), whose sum is σ = 20257776. Its totient is φ = 20239720.

The previous prime is 20248733. The next prime is 20248771. The reversal of 20248747 is 74784202.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20248747 - 2¹⁹ = 19724459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20248777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1722 + ... + 6592.

It is an arithmetic number, because the mean of its divisors is an integer number (5064444).

Almost surely, 2^20248747 is an apocalyptic number.

20248747 is a deficient number, since it is larger than the sum of its proper divisors (9029).

20248747 is an equidigital number, since it uses as much as digits as its factorization.

20248747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9028.

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 20248747 is about 4499.8607756241. The cubic root of 20248747 is about 272.5624669518.

The spelling of 20248747 in words is "twenty million, two hundred forty-eight thousand, seven hundred forty-seven".