20144402051 has 4 divisors (see below), whose sum is σ = 20794221504. Its totient is φ = 19494582600.

The previous prime is 20144402027. The next prime is 20144402071. The reversal of 20144402051 is 15020444102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20144402051 - 2⁶ = 20144401987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20144402071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324909680 + ... + 324909741.

It is an arithmetic number, because the mean of its divisors is an integer number (5198555376).

Almost surely, 2^20144402051 is an apocalyptic number.

20144402051 is a deficient number, since it is larger than the sum of its proper divisors (649819453).

20144402051 is an equidigital number, since it uses as much as digits as its factorization.

20144402051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649819452.

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 20144402051 its reverse (15020444102), we get a palindrome (35164846153).

The spelling of 20144402051 in words is "twenty billion, one hundred forty-four million, four hundred two thousand, fifty-one".