20801546153181 has 16 divisors (see below), whose sum is σ = 30821651649600. Its totient is φ = 13865651628624.

The previous prime is 20801546153023. The next prime is 20801546153209. The reversal of 20801546153181 is 18135164510802.

20801546153181 is a `hidden beast` number, since 2 + 0 + 8 + 0 + 1 + 5 + 461 + 5 + 3 + 181 = 666.

It is not a de Polignac number, because 20801546153181 - 2¹³ = 20801546144989 is a prime.

It is a super-2 number, since 2×20801546153181² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20801546153981) 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, 56641546 + ... + 57007611.

It is an arithmetic number, because the mean of its divisors is an integer number (1926353228100).

Almost surely, 2^{20801546153181} is an apocalyptic number.

It is an amenable number.

20801546153181 is a deficient number, since it is larger than the sum of its proper divisors (10020105496419).

20801546153181 is a wasteful number, since it uses less digits than its factorization.

20801546153181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113655945 (or 113655939 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The spelling of 20801546153181 in words is "twenty trillion, eight hundred one billion, five hundred forty-six million, one hundred fifty-three thousand, one hundred eighty-one".