20801380438611 has 48 divisors (see below), whose sum is σ = 33090034348800. Its totient is φ = 12533351092416.

The previous prime is 20801380438609. The next prime is 20801380438627. The reversal of 20801380438611 is 11683408310802.

20801380438611 is a `hidden beast` number, since 2 + 0 + 80 + 1 + 3 + 80 + 438 + 61 + 1 = 666.

It is not a de Polignac number, because 20801380438611 - 2¹ = 20801380438609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20801380438511) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5486880 + ... + 8468093.

It is an arithmetic number, because the mean of its divisors is an integer number (689375715600).

Almost surely, 2^{20801380438611} is an apocalyptic number.

20801380438611 is a deficient number, since it is larger than the sum of its proper divisors (12288653910189).

20801380438611 is a wasteful number, since it uses less digits than its factorization.

20801380438611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13955400 (or 13955397 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 20801380438611 in words is "twenty trillion, eight hundred one billion, three hundred eighty million, four hundred thirty-eight thousand, six hundred eleven".