20611265345 has 32 divisors (see below), whose sum is σ = 27137255040. Its totient is φ = 14904000000.

The previous prime is 20611265329. The next prime is 20611265351. The reversal of 20611265345 is 54356211602.

It is not a de Polignac number, because 20611265345 - 2⁴ = 20611265329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11443445 + ... + 11445245.

It is an arithmetic number, because the mean of its divisors is an integer number (848039220).

Almost surely, 2^20611265345 is an apocalyptic number.

It is an amenable number.

20611265345 is a deficient number, since it is larger than the sum of its proper divisors (6525989695).

20611265345 is a wasteful number, since it uses less digits than its factorization.

20611265345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2897.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 20611265345 its reverse (54356211602), we get a palindrome (74967476947).

The spelling of 20611265345 in words is "twenty billion, six hundred eleven million, two hundred sixty-five thousand, three hundred forty-five".