20111691386 has 8 divisors (see below), whose sum is σ = 30169623744. Its totient is φ = 10055150140.

The previous prime is 20111691343. The next prime is 20111691401. The reversal of 20111691386 is 68319611102.

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

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, 310850 + ... + 369933.

It is an arithmetic number, because the mean of its divisors is an integer number (3771202968).

Almost surely, 2^20111691386 is an apocalyptic number.

20111691386 is a deficient number, since it is larger than the sum of its proper divisors (10057932358).

20111691386 is a wasteful number, since it uses less digits than its factorization.

20111691386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695556.

The product of its (nonzero) digits is 15552, while the sum is 38.

The spelling of 20111691386 in words is "twenty billion, one hundred eleven million, six hundred ninety-one thousand, three hundred eighty-six".