20203435515144 has 64 divisors (see below), whose sum is σ = 58670398247040. Its totient is φ = 5677780469760.

The previous prime is 20203435515047. The next prime is 20203435515167. The reversal of 20203435515144 is 44151553430202.

It is a super-2 number, since 2×20203435515144² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 985715529 + ... + 985736024.

It is an arithmetic number, because the mean of its divisors is an integer number (916724972610).

Almost surely, 2^{20203435515144} is an apocalyptic number.

20203435515144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20203435515144 is an abundant number, since it is smaller than the sum of its proper divisors (38466962731896).

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

20203435515144 is a wasteful number, since it uses less digits than its factorization.

20203435515144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971451630 (or 1971451626 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 39.

Adding to 20203435515144 its reverse (44151553430202), we get a palindrome (64354988945346).

The spelling of 20203435515144 in words is "twenty trillion, two hundred three billion, four hundred thirty-five million, five hundred fifteen thousand, one hundred forty-four".