20134686 has 64 divisors (see below), whose sum is σ = 48900096. Its totient is φ = 5443200.

The previous prime is 20134669. The next prime is 20134703. The reversal of 20134686 is 68643102.

It is an interprime number because it is at equal distance from previous prime (20134669) and next prime (20134703).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26220 + ... + 26976.

It is an arithmetic number, because the mean of its divisors is an integer number (764064).

Almost surely, 2^20134686 is an apocalyptic number.

20134686 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20134686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24450048).

20134686 is an abundant number, since it is smaller than the sum of its proper divisors (28765410).

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

20134686 is a wasteful number, since it uses less digits than its factorization.

20134686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20134686 is about 4487.1690407204. The cubic root of 20134686 is about 272.0497223835.

Adding to 20134686 its reverse (68643102), we get a palindrome (88777788).

The spelling of 20134686 in words is "twenty million, one hundred thirty-four thousand, six hundred eighty-six".