20370739 has 2 divisors, whose sum is σ = 20370740. Its totient is φ = 20370738.

The previous prime is 20370719. The next prime is 20370761. The reversal of 20370739 is 93707302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20370739 - 2⁹ = 20370227 is a prime.

It is a super-2 number, since 2×20370739² = 829934014812242, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1292629 and since 20370739 and 1292629 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20370739.

It is not a weakly prime, because it can be changed into another prime (20370719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10185369 + 10185370.

It is an arithmetic number, because the mean of its divisors is an integer number (10185370).

Almost surely, 2^20370739 is an apocalyptic number.

20370739 is a deficient number, since it is larger than the sum of its proper divisors (1).

20370739 is an equidigital number, since it uses as much as digits as its factorization.

20370739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 31.

The square root of 20370739 is about 4513.3955067111. The cubic root of 20370739 is about 273.1087376053.

The spelling of 20370739 in words is "twenty million, three hundred seventy thousand, seven hundred thirty-nine".