20116661610 has 32 divisors (see below), whose sum is σ = 48384749952. Its totient is φ = 5352802880.

The previous prime is 20116661599. The next prime is 20116661633. The reversal of 20116661610 is 1616661102.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 713454 + ... + 741113.

It is an arithmetic number, because the mean of its divisors is an integer number (1512023436).

Almost surely, 2^20116661610 is an apocalyptic number.

20116661610 is an abundant number, since it is smaller than the sum of its proper divisors (28268088342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20116661610 is a wasteful number, since it uses less digits than its factorization.

20116661610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455038.

The product of its (nonzero) digits is 2592, while the sum is 30.

The spelling of 20116661610 in words is "twenty billion, one hundred sixteen million, six hundred sixty-one thousand, six hundred ten".