20069251 has 2 divisors, whose sum is σ = 20069252. Its totient is φ = 20069250.

The previous prime is 20069249. The next prime is 20069303. The reversal of 20069251 is 15296002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20069251 - 2¹ = 20069249 is a prime.

Together with 20069249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20069551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10034625 + 10034626.

It is an arithmetic number, because the mean of its divisors is an integer number (10034626).

Almost surely, 2^20069251 is an apocalyptic number.

20069251 is a deficient number, since it is larger than the sum of its proper divisors (1).

20069251 is an equidigital number, since it uses as much as digits as its factorization.

20069251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 20069251 is about 4479.8717615575. The cubic root of 20069251 is about 271.7546943125.

The spelling of 20069251 in words is "twenty million, sixty-nine thousand, two hundred fifty-one".