20514355515140 has 12 divisors (see below), whose sum is σ = 43080146581836. Its totient is φ = 8205742206048.

The previous prime is 20514355515133. The next prime is 20514355515211. The reversal of 20514355515140 is 4151555341502.

It can be written as a sum of positive squares in 2 ways, for example, as 12781139805184 + 7733215709956 = 3575072^2 + 2780866^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512858887859 + ... + 512858887898.

It is an arithmetic number, because the mean of its divisors is an integer number (3590012215153).

Almost surely, 2^{20514355515140} is an apocalyptic number.

20514355515140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20514355515140 is an abundant number, since it is smaller than the sum of its proper divisors (22565791066696).

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

20514355515140 is a wasteful number, since it uses less digits than its factorization.

20514355515140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025717775766 (or 1025717775764 counting only the distinct ones).

The product of its (nonzero) digits is 300000, while the sum is 41.

The spelling of 20514355515140 in words is "twenty trillion, five hundred fourteen billion, three hundred fifty-five million, five hundred fifteen thousand, one hundred forty".