20611152005 has 8 divisors (see below), whose sum is σ = 24913918872. Its totient is φ = 16368563968.

The previous prime is 20611151999. The next prime is 20611152043. The reversal of 20611152005 is 50025111602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2067793729 + 18543358276 = 45473^2 + 136174^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20611152005 - 2²⁸ = 20342716549 is a prime.

It is a Duffinian number.

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, 15043952 + ... + 15045321.

It is an arithmetic number, because the mean of its divisors is an integer number (3114239859).

Almost surely, 2^20611152005 is an apocalyptic number.

It is an amenable number.

20611152005 is a deficient number, since it is larger than the sum of its proper divisors (4302766867).

20611152005 is a wasteful number, since it uses less digits than its factorization.

20611152005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30089415.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 20611152005 its reverse (50025111602), we get a palindrome (70636263607).

The spelling of 20611152005 in words is "twenty billion, six hundred eleven million, one hundred fifty-two thousand, five".