20430626545 has 16 divisors (see below), whose sum is σ = 28281011328. Its totient is φ = 13878639360.

The previous prime is 20430626543. The next prime is 20430626549. The reversal of 20430626545 is 54562603402.

It is not a de Polignac number, because 20430626545 - 2¹ = 20430626543 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20430626543) 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 15 ways as a sum of consecutive naturals, for example, 2723976 + ... + 2731465.

It is an arithmetic number, because the mean of its divisors is an integer number (1767563208).

Almost surely, 2^20430626545 is an apocalyptic number.

It is an amenable number.

20430626545 is a deficient number, since it is larger than the sum of its proper divisors (7850384783).

20430626545 is a wasteful number, since it uses less digits than its factorization.

20430626545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5455560.

The product of its (nonzero) digits is 172800, while the sum is 37.

The spelling of 20430626545 in words is "twenty billion, four hundred thirty million, six hundred twenty-six thousand, five hundred forty-five".