20142707 has 4 divisors (see below), whose sum is σ = 21692160. Its totient is φ = 18593256.

The previous prime is 20142701. The next prime is 20142719. The reversal of 20142707 is 70724102.

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 20142707 - 2¹⁶ = 20077171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20142701) 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, 774707 + ... + 774732.

It is an arithmetic number, because the mean of its divisors is an integer number (5423040).

Almost surely, 2^20142707 is an apocalyptic number.

20142707 is a deficient number, since it is larger than the sum of its proper divisors (1549453).

20142707 is a wasteful number, since it uses less digits than its factorization.

20142707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549452.

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

The square root of 20142707 is about 4488.0627223781. The cubic root of 20142707 is about 272.0858428231.

Adding to 20142707 its reverse (70724102), we get a palindrome (90866809).

The spelling of 20142707 in words is "twenty million, one hundred forty-two thousand, seven hundred seven".