20554431101540 has 48 divisors (see below), whose sum is σ = 51031691020800. Its totient is φ = 6804225466752.

The previous prime is 20554431101507. The next prime is 20554431101543. The reversal of 20554431101540 is 4510113445502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 20554431101540.

It is not an unprimeable number, because it can be changed into a prime (20554431101543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2531329820 + ... + 2531337939.

It is an arithmetic number, because the mean of its divisors is an integer number (1063160229600).

Almost surely, 2^{20554431101540} is an apocalyptic number.

20554431101540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20554431101540 is an abundant number, since it is smaller than the sum of its proper divisors (30477259919260).

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

20554431101540 is a wasteful number, since it uses less digits than its factorization.

20554431101540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5062667804 (or 5062667802 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 20554431101540 in words is "twenty trillion, five hundred fifty-four billion, four hundred thirty-one million, one hundred one thousand, five hundred forty".