20102986 has 8 divisors (see below), whose sum is σ = 30199140. Its totient is φ = 10036608.

The previous prime is 20102983. The next prime is 20103047. The reversal of 20102986 is 68920102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19633761 + 469225 = 4431^2 + 685^2 .

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

It is a super-2 number, since 2×20102986² = 808260092232392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20102983) 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, 5671 + ... + 8506.

Almost surely, 2^20102986 is an apocalyptic number.

20102986 is the 2836-th heptagonal number.

20102986 is a deficient number, since it is larger than the sum of its proper divisors (10096154).

20102986 is a wasteful number, since it uses less digits than its factorization.

20102986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14888.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 20102986 is about 4483.6353553785. The cubic root of 20102986 is about 271.9068759208.

The spelling of 20102986 in words is "twenty million, one hundred two thousand, nine hundred eighty-six".