20554056340 has 12 divisors (see below), whose sum is σ = 43163518356. Its totient is φ = 8221622528.

The previous prime is 20554056337. The next prime is 20554056343. The reversal of 20554056340 is 4365045502.

It is an interprime number because it is at equal distance from previous prime (20554056337) and next prime (20554056343).

It can be written as a sum of positive squares in 2 ways, for example, as 5041852036 + 15512204304 = 71006^2 + 124548^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20554056296 and 20554056305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20554056343) 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 3 ways as a sum of consecutive naturals, for example, 513851389 + ... + 513851428.

It is an arithmetic number, because the mean of its divisors is an integer number (3596959863).

Almost surely, 2^20554056340 is an apocalyptic number.

20554056340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20554056340 is an abundant number, since it is smaller than the sum of its proper divisors (22609462016).

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

20554056340 is a wasteful number, since it uses less digits than its factorization.

20554056340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027702826 (or 1027702824 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 34.

The spelling of 20554056340 in words is "twenty billion, five hundred fifty-four million, fifty-six thousand, three hundred forty".