20552561245 has 8 divisors (see below), whose sum is σ = 24664046040. Its totient is φ = 16441400640.

The previous prime is 20552561233. The next prime is 20552561287. The reversal of 20552561245 is 54216525502.

It can be written as a sum of positive squares in 4 ways, for example, as 79816356 + 20472744889 = 8934^2 + 143083^2 .

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

It is not a de Polignac number, because 20552561245 - 2²³ = 20544172637 is a prime.

It is a congruent number.

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, 92035 + ... + 222655.

It is an arithmetic number, because the mean of its divisors is an integer number (3083005755).

Almost surely, 2^20552561245 is an apocalyptic number.

It is an amenable number.

20552561245 is a deficient number, since it is larger than the sum of its proper divisors (4111484795).

20552561245 is a wasteful number, since it uses less digits than its factorization.

20552561245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162095.

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 20552561245 in words is "twenty billion, five hundred fifty-two million, five hundred sixty-one thousand, two hundred forty-five".