20456707 has 2 divisors, whose sum is σ = 20456708. Its totient is φ = 20456706.

The previous prime is 20456699. The next prime is 20456713. The reversal of 20456707 is 70765402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20456707 - 2³ = 20456699 is a prime.

It is a super-2 number, since 2×20456707² = 836953722567698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20456747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10228353 + 10228354.

It is an arithmetic number, because the mean of its divisors is an integer number (10228354).

Almost surely, 2^20456707 is an apocalyptic number.

20456707 is a deficient number, since it is larger than the sum of its proper divisors (1).

20456707 is an equidigital number, since it uses as much as digits as its factorization.

20456707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 20456707 is about 4522.9091301949. The cubic root of 20456707 is about 273.4923869378.

The spelling of 20456707 in words is "twenty million, four hundred fifty-six thousand, seven hundred seven".