20000245 has 12 divisors (see below), whose sum is σ = 25496964. Its totient is φ = 15057920.

The previous prime is 20000243. The next prime is 20000269. The reversal of 20000245 is 54200002.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 339889 + 19660356 = 583^2 + 4434^2 .

It is not a de Polignac number, because 20000245 - 2¹ = 20000243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5476 + ... + 8365.

It is an arithmetic number, because the mean of its divisors is an integer number (2124747).

Almost surely, 2^20000245 is an apocalyptic number.

It is an amenable number.

20000245 is a deficient number, since it is larger than the sum of its proper divisors (5496719).

20000245 is a wasteful number, since it uses less digits than its factorization.

20000245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13880 (or 13863 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 20000245 is about 4472.1633467484. The cubic root of 20000245 is about 271.4428700422.

Adding to 20000245 its reverse (54200002), we get a palindrome (74200247).

The spelling of 20000245 in words is "twenty million, two hundred forty-five", and thus it is an aban number.