20072276545 has 4 divisors (see below), whose sum is σ = 24086731860. Its totient is φ = 16057821232.

The previous prime is 20072276507. The next prime is 20072276551. The reversal of 20072276545 is 54567227002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54567227002 = 2 ⋅27283613501.

It can be written as a sum of positive squares in 2 ways, for example, as 15731179776 + 4341096769 = 125424^2 + 65887^2 .

It is a cyclic number.

It is not a de Polignac number, because 20072276545 - 2¹³ = 20072268353 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20072276498 and 20072276507.

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, 2007227650 + ... + 2007227659.

It is an arithmetic number, because the mean of its divisors is an integer number (6021682965).

Almost surely, 2^20072276545 is an apocalyptic number.

It is an amenable number.

20072276545 is a deficient number, since it is larger than the sum of its proper divisors (4014455315).

20072276545 is an equidigital number, since it uses as much as digits as its factorization.

20072276545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4014455314.

The product of its (nonzero) digits is 235200, while the sum is 40.

The spelling of 20072276545 in words is "twenty billion, seventy-two million, two hundred seventy-six thousand, five hundred forty-five".