20554533140 has 48 divisors (see below), whose sum is σ = 44080122240. Its totient is φ = 8048127360.

The previous prime is 20554533137. The next prime is 20554533143. The reversal of 20554533140 is 4133545502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20554533137) and next prime (20554533143).

It is a junction number, because it is equal to n+sod(n) for n = 20554533097 and 20554533106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20554533143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 443255 + ... + 487425.

It is an arithmetic number, because the mean of its divisors is an integer number (918335880).

Almost surely, 2^20554533140 is an apocalyptic number.

20554533140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20554533140 is an abundant number, since it is smaller than the sum of its proper divisors (23525589100).

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

20554533140 is a wasteful number, since it uses less digits than its factorization.

20554533140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44672 (or 44670 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

The spelling of 20554533140 in words is "twenty billion, five hundred fifty-four million, five hundred thirty-three thousand, one hundred forty".