20340161554 has 8 divisors (see below), whose sum is σ = 30535316028. Its totient is φ = 10161722880.

The previous prime is 20340161497. The next prime is 20340161609. The reversal of 20340161554 is 45516104302.

It is a happy number.

20340161554 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 18652184329 + 1687977225 = 136573^2 + 41085^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4175907 + ... + 4180774.

Almost surely, 2^20340161554 is an apocalyptic number.

20340161554 is a deficient number, since it is larger than the sum of its proper divisors (10195154474).

20340161554 is a wasteful number, since it uses less digits than its factorization.

20340161554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8357900.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 20340161554 its reverse (45516104302), we get a palindrome (65856265856).

The spelling of 20340161554 in words is "twenty billion, three hundred forty million, one hundred sixty-one thousand, five hundred fifty-four".