20315513450 has 48 divisors (see below), whose sum is σ = 39800473440. Its totient is φ = 7693704000.

The previous prime is 20315513437. The next prime is 20315513459. The reversal of 20315513450 is 5431551302.

It is not an unprimeable number, because it can be changed into a prime (20315513459) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1762205 + ... + 1773695.

It is an arithmetic number, because the mean of its divisors is an integer number (829176530).

Almost surely, 2^20315513450 is an apocalyptic number.

20315513450 is a deficient number, since it is larger than the sum of its proper divisors (19484959990).

20315513450 is a wasteful number, since it uses less digits than its factorization.

20315513450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13383 (or 13378 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The spelling of 20315513450 in words is "twenty billion, three hundred fifteen million, five hundred thirteen thousand, four hundred fifty".