20111220011986 has 8 divisors (see below), whose sum is σ = 30250860186240. Its totient is φ = 10027599949908.

The previous prime is 20111220011983. The next prime is 20111220012019. The reversal of 20111220011986 is 68911002211102.

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

It is a super-2 number, since 2×20111220011986² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20111220011983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14005027146 + ... + 14005028581.

It is an arithmetic number, because the mean of its divisors is an integer number (3781357523280).

Almost surely, 2^{20111220011986} is an apocalyptic number.

20111220011986 is a deficient number, since it is larger than the sum of its proper divisors (10139640174254).

20111220011986 is a wasteful number, since it uses less digits than its factorization.

20111220011986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28010056088.

The product of its (nonzero) digits is 3456, while the sum is 34.

The spelling of 20111220011986 in words is "twenty trillion, one hundred eleven billion, two hundred twenty million, eleven thousand, nine hundred eighty-six".