2153123555020 has 24 divisors (see below), whose sum is σ = 4521705454224. Its totient is φ = 861221614656.

The previous prime is 2153123555003. The next prime is 2153123555057. The reversal of 2153123555020 is 205553213512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1097274 + ... + 2347393.

It is an arithmetic number, because the mean of its divisors is an integer number (188404393926).

Almost surely, 2^{2153123555020} is an apocalyptic number.

2153123555020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2153123555020 is an abundant number, since it is smaller than the sum of its proper divisors (2368581899204).

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

2153123555020 is a wasteful number, since it uses less digits than its factorization.

2153123555020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3475929 (or 3475927 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

Adding to 2153123555020 its reverse (205553213512), we get a palindrome (2358676768532).

The spelling of 2153123555020 in words is "two trillion, one hundred fifty-three billion, one hundred twenty-three million, five hundred fifty-five thousand, twenty".