20606112545 has 8 divisors (see below), whose sum is σ = 25580001960. Its totient is φ = 15916445440.

The previous prime is 20606112533. The next prime is 20606112559. The reversal of 20606112545 is 54521160602.

It can be written as a sum of positive squares in 4 ways, for example, as 2005517089 + 18600595456 = 44783^2 + 136384^2 .

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

It is not a de Polignac number, because 20606112545 - 2⁴ = 20606112529 is a prime.

It is a super-2 number, since 2×20606112545² (a number of 21 digits) contains 22 as substring.

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, 71055416 + ... + 71055705.

It is an arithmetic number, because the mean of its divisors is an integer number (3197500245).

Almost surely, 2^20606112545 is an apocalyptic number.

It is an amenable number.

20606112545 is a deficient number, since it is larger than the sum of its proper divisors (4973889415).

20606112545 is a wasteful number, since it uses less digits than its factorization.

20606112545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142111155.

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 20606112545 in words is "twenty billion, six hundred six million, one hundred twelve thousand, five hundred forty-five".