20611612851 has 8 divisors (see below), whose sum is σ = 28928579520. Its totient is φ = 13017860712.

The previous prime is 20611612843. The next prime is 20611612907. The reversal of 20611612851 is 15821611602.

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

It is not a de Polignac number, because 20611612851 - 2³ = 20611612843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20611612841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180803565 + ... + 180803678.

It is an arithmetic number, because the mean of its divisors is an integer number (3616072440).

Almost surely, 2^20611612851 is an apocalyptic number.

20611612851 is a deficient number, since it is larger than the sum of its proper divisors (8316966669).

20611612851 is a wasteful number, since it uses less digits than its factorization.

20611612851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361607265.

The product of its (nonzero) digits is 5760, while the sum is 33.

The spelling of 20611612851 in words is "twenty billion, six hundred eleven million, six hundred twelve thousand, eight hundred fifty-one".