20154143231401 has 4 divisors (see below), whose sum is σ = 20164286234512. Its totient is φ = 20144000228292.

The previous prime is 20154143231357. The next prime is 20154143231407. The reversal of 20154143231401 is 10413234145102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20154143231401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20154143231407) by changing a digit.

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, 5071498575 + ... + 5071502548.

It is an arithmetic number, because the mean of its divisors is an integer number (5041071558628).

Almost surely, 2^{20154143231401} is an apocalyptic number.

It is an amenable number.

20154143231401 is a deficient number, since it is larger than the sum of its proper divisors (10143003111).

20154143231401 is a wasteful number, since it uses less digits than its factorization.

20154143231401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10143003110.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 20154143231401 its reverse (10413234145102), we get a palindrome (30567377376503).

The spelling of 20154143231401 in words is "twenty trillion, one hundred fifty-four billion, one hundred forty-three million, two hundred thirty-one thousand, four hundred one".