245023020 has 144 divisors (see below), whose sum is σ = 823350528. Its totient is φ = 58481280.

The previous prime is 245022997. The next prime is 245023049. The reversal of 245023020 is 20320542.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 245022984 and 245023002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 131737 + ... + 133583.

It is an arithmetic number, because the mean of its divisors is an integer number (5717712).

Almost surely, 2^245023020 is an apocalyptic number.

245023020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245023020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411675264).

245023020 is an abundant number, since it is smaller than the sum of its proper divisors (578327508).

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

245023020 is a wasteful number, since it uses less digits than its factorization.

245023020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940 (or 1935 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 245023020 is about 15653.2111721525. The cubic root of 245023020 is about 625.7520717247.

Adding to 245023020 its reverse (20320542), we get a palindrome (265343562).

The spelling of 245023020 in words is "two hundred forty-five million, twenty-three thousand, twenty".