20155340046550 has 48 divisors (see below), whose sum is σ = 37782873638640. Its totient is φ = 7999167421440.

The previous prime is 20155340046529. The next prime is 20155340046551. The reversal of 20155340046550 is 5564004355102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155340046551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 240286 + ... + 6353614.

It is an arithmetic number, because the mean of its divisors is an integer number (787143200805).

Almost surely, 2^{20155340046550} is an apocalyptic number.

20155340046550 is a deficient number, since it is larger than the sum of its proper divisors (17627533592090).

20155340046550 is a wasteful number, since it uses less digits than its factorization.

20155340046550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6113857 (or 6113852 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 40.

The spelling of 20155340046550 in words is "twenty trillion, one hundred fifty-five billion, three hundred forty million, forty-six thousand, five hundred fifty".