20214729 has 12 divisors (see below), whose sum is σ = 29678532. Its totient is φ = 13255200.

The previous prime is 20214721. The next prime is 20214731. The reversal of 20214729 is 92741202.

It can be written as a sum of positive squares in 2 ways, for example, as 2975625 + 17239104 = 1725^2 + 4152^2 .

It is not a de Polignac number, because 20214729 - 2³ = 20214721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20214721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17862 + ... + 18959.

It is an arithmetic number, because the mean of its divisors is an integer number (2473211).

Almost surely, 2^20214729 is an apocalyptic number.

It is an amenable number.

20214729 is a deficient number, since it is larger than the sum of its proper divisors (9463803).

20214729 is a wasteful number, since it uses less digits than its factorization.

20214729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36888 (or 36885 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 20214729 is about 4496.0792920054. The cubic root of 20214729 is about 272.4097459430.

The spelling of 20214729 in words is "twenty million, two hundred fourteen thousand, seven hundred twenty-nine".