20702069 has 2 divisors, whose sum is σ = 20702070. Its totient is φ = 20702068.

The previous prime is 20702063. The next prime is 20702081. The reversal of 20702069 is 96020702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20295025 + 407044 = 4505^2 + 638^2 .

It is a cyclic number.

It is not a de Polignac number, because 20702069 - 2⁴ = 20702053 is a prime.

It is a super-2 number, since 2×20702069² = 857151321761522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20702063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10351034 + 10351035.

It is an arithmetic number, because the mean of its divisors is an integer number (10351035).

Almost surely, 2^20702069 is an apocalyptic number.

It is an amenable number.

20702069 is a deficient number, since it is larger than the sum of its proper divisors (1).

20702069 is an equidigital number, since it uses as much as digits as its factorization.

20702069 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 20702069 is about 4549.9526371161. The cubic root of 20702069 is about 274.5814857128.

The spelling of 20702069 in words is "twenty million, seven hundred two thousand, sixty-nine".