20681214 has 16 divisors (see below), whose sum is σ = 43795728. Its totient is φ = 6488192.

The previous prime is 20681207. The next prime is 20681233. The reversal of 20681214 is 41218602.

It is a super-2 number, since 2×20681214² = 855425225027592, which 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 7 ways as a sum of consecutive naturals, for example, 101277 + ... + 101480.

It is an arithmetic number, because the mean of its divisors is an integer number (2737233).

Almost surely, 2^20681214 is an apocalyptic number.

20681214 is an abundant number, since it is smaller than the sum of its proper divisors (23114514).

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

20681214 is a wasteful number, since it uses less digits than its factorization.

20681214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202779.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 20681214 is about 4547.6602775493. The cubic root of 20681214 is about 274.4892514396.

Adding to 20681214 its reverse (41218602), we get a palindrome (61899816).

The spelling of 20681214 in words is "twenty million, six hundred eighty-one thousand, two hundred fourteen".