20140739 has 2 divisors, whose sum is σ = 20140740. Its totient is φ = 20140738.

The previous prime is 20140667. The next prime is 20140751. The reversal of 20140739 is 93704102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20140739 - 2²⁰ = 19092163 is a prime.

It is a super-2 number, since 2×20140739² = 811298734932242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20140639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10070369 + 10070370.

It is an arithmetic number, because the mean of its divisors is an integer number (10070370).

Almost surely, 2^20140739 is an apocalyptic number.

20140739 is a deficient number, since it is larger than the sum of its proper divisors (1).

20140739 is an equidigital number, since it uses as much as digits as its factorization.

20140739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20140739 is about 4487.8434687498. The cubic root of 20140739 is about 272.0769813465.

The spelling of 20140739 in words is "twenty million, one hundred forty thousand, seven hundred thirty-nine".