20140807 has 2 divisors, whose sum is σ = 20140808. Its totient is φ = 20140806.

The previous prime is 20140787. The next prime is 20140823. The reversal of 20140807 is 70804102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20140807 is a prime.

It is a super-2 number, since 2×20140807² = 811304213222498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20140907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10070403 + 10070404.

It is an arithmetic number, because the mean of its divisors is an integer number (10070404).

Almost surely, 2^20140807 is an apocalyptic number.

20140807 is a deficient number, since it is larger than the sum of its proper divisors (1).

20140807 is an equidigital number, since it uses as much as digits as its factorization.

20140807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 20140807 is about 4487.8510447652. The cubic root of 20140807 is about 272.0772875454.

Adding to 20140807 its reverse (70804102), we get a palindrome (90944909).

The spelling of 20140807 in words is "twenty million, one hundred forty thousand, eight hundred seven".