20475733540 has 24 divisors (see below), whose sum is σ = 43008005880. Its totient is φ = 8188585728.

The previous prime is 20475733519. The next prime is 20475733547. The reversal of 20475733540 is 4533757402.

It can be written as a sum of positive squares in 4 ways, for example, as 6879707136 + 13596026404 = 82944^2 + 116602^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20475733493 and 20475733502.

It is not an unprimeable number, because it can be changed into a prime (20475733547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6097 + ... + 202456.

It is an arithmetic number, because the mean of its divisors is an integer number (1792000245).

Almost surely, 2^20475733540 is an apocalyptic number.

20475733540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20475733540 is an abundant number, since it is smaller than the sum of its proper divisors (22532272340).

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

20475733540 is a wasteful number, since it uses less digits than its factorization.

20475733540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213471 (or 213469 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 40.

The spelling of 20475733540 in words is "twenty billion, four hundred seventy-five million, seven hundred thirty-three thousand, five hundred forty".