20111610612 has 12 divisors (see below), whose sum is σ = 46927091456. Its totient is φ = 6703870200.

The previous prime is 20111610593. The next prime is 20111610641. The reversal of 20111610612 is 21601611102.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20111610612² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837983764 + ... + 837983787.

Almost surely, 2^20111610612 is an apocalyptic number.

It is an amenable number.

20111610612 is an abundant number, since it is smaller than the sum of its proper divisors (26815480844).

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

20111610612 is a wasteful number, since it uses less digits than its factorization.

20111610612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675967558 (or 1675967556 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 20111610612 in words is "twenty billion, one hundred eleven million, six hundred ten thousand, six hundred twelve".