20543154155000 has 80 divisors (see below), whose sum is σ = 48150581475480. Its totient is φ = 8214193584000.

The previous prime is 20543154154997. The next prime is 20543154155011. The reversal of 20543154155000 is 55145134502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12649322 + ... + 14180678.

Almost surely, 2^{20543154155000} is an apocalyptic number.

20543154155000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20543154155000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24075290737740).

20543154155000 is an abundant number, since it is smaller than the sum of its proper divisors (27607427320480).

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

20543154155000 is a wasteful number, since it uses less digits than its factorization.

20543154155000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534066 (or 1534047 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

Adding to 20543154155000 its reverse (55145134502), we get a palindrome (20598299289502).

The spelling of 20543154155000 in words is "twenty trillion, five hundred forty-three billion, one hundred fifty-four million, one hundred fifty-five thousand".