20455434512 has 20 divisors (see below), whose sum is σ = 40282117836. Its totient is φ = 10060049280.

The previous prime is 20455434473. The next prime is 20455434539. The reversal of 20455434512 is 21543455402.

It can be written as a sum of positive squares in 2 ways, for example, as 5703874576 + 14751559936 = 75524^2 + 121456^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10478243 + ... + 10480194.

Almost surely, 2^20455434512 is an apocalyptic number.

It is an amenable number.

20455434512 is a deficient number, since it is larger than the sum of its proper divisors (19826683324).

20455434512 is a wasteful number, since it uses less digits than its factorization.

20455434512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20958506 (or 20958500 counting only the distinct ones).

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

Adding to 20455434512 its reverse (21543455402), we get a palindrome (41998889914).

The spelling of 20455434512 in words is "twenty billion, four hundred fifty-five million, four hundred thirty-four thousand, five hundred twelve".