20434556554 has 16 divisors (see below), whose sum is σ = 30708821736. Its totient is φ = 10198302400.

The previous prime is 20434556509. The next prime is 20434556561. The reversal of 20434556554 is 45565543402.

It can be written as a sum of positive squares in 4 ways, for example, as 16518675625 + 3915880929 = 128525^2 + 62577^2 .

It is a super-2 number, since 2×20434556554² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20434556554.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2706024 + ... + 2713564.

Almost surely, 2^20434556554 is an apocalyptic number.

20434556554 is a deficient number, since it is larger than the sum of its proper divisors (10274265182).

20434556554 is a wasteful number, since it uses less digits than its factorization.

20434556554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9881.

The product of its (nonzero) digits is 1440000, while the sum is 43.

The spelling of 20434556554 in words is "twenty billion, four hundred thirty-four million, five hundred fifty-six thousand, five hundred fifty-four".