20701427 has 4 divisors (see below), whose sum is σ = 21919176. Its totient is φ = 19483680.

The previous prime is 20701423. The next prime is 20701441. The reversal of 20701427 is 72410702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20701427 - 2² = 20701423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20701423) 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, 608849 + ... + 608882.

It is an arithmetic number, because the mean of its divisors is an integer number (5479794).

Almost surely, 2^20701427 is an apocalyptic number.

20701427 is a deficient number, since it is larger than the sum of its proper divisors (1217749).

20701427 is a wasteful number, since it uses less digits than its factorization.

20701427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217748.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 20701427 is about 4549.8820863842. The cubic root of 20701427 is about 274.5786472986.

The spelling of 20701427 in words is "twenty million, seven hundred one thousand, four hundred twenty-seven".