20455234154 has 8 divisors (see below), whose sum is σ = 30683507268. Its totient is φ = 10227398400.

The previous prime is 20455234147. The next prime is 20455234157. The reversal of 20455234154 is 45143255402.

It can be written as a sum of positive squares in 2 ways, for example, as 19520281225 + 934952929 = 139715^2 + 30577^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20455234157) 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, 60104 + ... + 211004.

Almost surely, 2^20455234154 is an apocalyptic number.

20455234154 is a deficient number, since it is larger than the sum of its proper divisors (10228273114).

20455234154 is a wasteful number, since it uses less digits than its factorization.

20455234154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218680.

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 20455234154 its reverse (45143255402), we get a palindrome (65598489556).

The spelling of 20455234154 in words is "twenty billion, four hundred fifty-five million, two hundred thirty-four thousand, one hundred fifty-four".