20533117260 has 24 divisors (see below), whose sum is σ = 57492728496. Its totient is φ = 5475497920.

The previous prime is 20533117211. The next prime is 20533117261. The reversal of 20533117260 is 6271133502.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (20533117261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171109251 + ... + 171109370.

It is an arithmetic number, because the mean of its divisors is an integer number (2395530354).

Almost surely, 2^20533117260 is an apocalyptic number.

20533117260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20533117260 is an abundant number, since it is smaller than the sum of its proper divisors (36959611236).

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

20533117260 is a wasteful number, since it uses less digits than its factorization.

20533117260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342218633 (or 342218631 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The spelling of 20533117260 in words is "twenty billion, five hundred thirty-three million, one hundred seventeen thousand, two hundred sixty".