20140054581 has 64 divisors (see below), whose sum is σ = 30203228160. Its totient is φ = 11871974400.

The previous prime is 20140054579. The next prime is 20140054601. The reversal of 20140054581 is 18545004102.

It is not a de Polignac number, because 20140054581 - 2¹ = 20140054579 is a prime.

It is a super-2 number, since 2×20140054581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20140054981) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16467136 + ... + 16468358.

It is an arithmetic number, because the mean of its divisors is an integer number (471925440).

Almost surely, 2^20140054581 is an apocalyptic number.

It is an amenable number.

20140054581 is a deficient number, since it is larger than the sum of its proper divisors (10063173579).

20140054581 is a wasteful number, since it uses less digits than its factorization.

20140054581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506.

The product of its (nonzero) digits is 6400, while the sum is 30.

Adding to 20140054581 its reverse (18545004102), we get a palindrome (38685058683).

The spelling of 20140054581 in words is "twenty billion, one hundred forty million, fifty-four thousand, five hundred eighty-one".