20101775145 has 8 divisors (see below), whose sum is σ = 32162840256. Its totient is φ = 10720946736.

The previous prime is 20101775131. The next prime is 20101775179. The reversal of 20101775145 is 54157710102.

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

It is not a de Polignac number, because 20101775145 - 2¹² = 20101771049 is a prime.

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, 670059157 + ... + 670059186.

It is an arithmetic number, because the mean of its divisors is an integer number (4020355032).

Almost surely, 2^20101775145 is an apocalyptic number.

It is an amenable number.

20101775145 is a deficient number, since it is larger than the sum of its proper divisors (12061065111).

20101775145 is a wasteful number, since it uses less digits than its factorization.

20101775145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340118351.

The product of its (nonzero) digits is 9800, while the sum is 33.

The spelling of 20101775145 in words is "twenty billion, one hundred one million, seven hundred seventy-five thousand, one hundred forty-five".