20315337240 has 64 divisors (see below), whose sum is σ = 66486562560. Its totient is φ = 4924929920.

The previous prime is 20315337223. The next prime is 20315337277. The reversal of 20315337240 is 4273351302.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20315337198 and 20315337207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7693884 + ... + 7696523.

It is an arithmetic number, because the mean of its divisors is an integer number (1038852540).

Almost surely, 2^20315337240 is an apocalyptic number.

20315337240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20315337240 is an abundant number, since it is smaller than the sum of its proper divisors (46171225320).

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

20315337240 is a wasteful number, since it uses less digits than its factorization.

20315337240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15390432 (or 15390428 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 30.

Adding to 20315337240 its reverse (4273351302), we get a palindrome (24588688542).

The spelling of 20315337240 in words is "twenty billion, three hundred fifteen million, three hundred thirty-seven thousand, two hundred forty".