20533550240 has 48 divisors (see below), whose sum is σ = 55440588672. Its totient is φ = 7040073984.

The previous prime is 20533550231. The next prime is 20533550269. The reversal of 20533550240 is 4205533502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9165644 + ... + 9167883.

It is an arithmetic number, because the mean of its divisors is an integer number (1155012264).

Almost surely, 2^20533550240 is an apocalyptic number.

20533550240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20533550240 is an abundant number, since it is smaller than the sum of its proper divisors (34907038432).

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

20533550240 is a wasteful number, since it uses less digits than its factorization.

20533550240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18333549 (or 18333541 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 29.

The spelling of 20533550240 in words is "twenty billion, five hundred thirty-three million, five hundred fifty thousand, two hundred forty".