1020236405540 has 48 divisors (see below), whose sum is σ = 2337346851840. Its totient is φ = 370982676480.

The previous prime is 1020236405533. The next prime is 1020236405543. The reversal of 1020236405540 is 455046320201.

It is a junction number, because it is equal to n+sod(n) for n = 1020236405497 and 1020236405506.

It is not an unprimeable number, because it can be changed into a prime (1020236405543) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8883524 + ... + 8997636.

It is an arithmetic number, because the mean of its divisors is an integer number (48694726080).

Almost surely, 2^{1020236405540} is an apocalyptic number.

1020236405540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020236405540 is an abundant number, since it is smaller than the sum of its proper divisors (1317110446300).

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

1020236405540 is a wasteful number, since it uses less digits than its factorization.

1020236405540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154772 (or 154770 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The spelling of 1020236405540 in words is "one trillion, twenty billion, two hundred thirty-six million, four hundred five thousand, five hundred forty".