20111610651 has 16 divisors (see below), whose sum is σ = 29414880768. Its totient is φ = 12121509600.

The previous prime is 20111610647. The next prime is 20111610661. The reversal of 20111610651 is 15601611102.

It is not a de Polignac number, because 20111610651 - 2² = 20111610647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20111610641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1677571 + ... + 1689516.

It is an arithmetic number, because the mean of its divisors is an integer number (1838430048).

Almost surely, 2^20111610651 is an apocalyptic number.

20111610651 is a deficient number, since it is larger than the sum of its proper divisors (9303270117).

20111610651 is a wasteful number, since it uses less digits than its factorization.

20111610651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3367282.

The product of its (nonzero) digits is 360, while the sum is 24.

The spelling of 20111610651 in words is "twenty billion, one hundred eleven million, six hundred ten thousand, six hundred fifty-one".