20628379 has 2 divisors, whose sum is σ = 20628380. Its totient is φ = 20628378.

The previous prime is 20628373. The next prime is 20628397. The reversal of 20628379 is 97382602.

Together with next prime (20628397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20628379 - 2¹⁷ = 20497307 is a prime.

It is a super-3 number, since 3×20628379³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20628373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10314189 + 10314190.

It is an arithmetic number, because the mean of its divisors is an integer number (10314190).

Almost surely, 2^20628379 is an apocalyptic number.

20628379 is a deficient number, since it is larger than the sum of its proper divisors (1).

20628379 is an equidigital number, since it uses as much as digits as its factorization.

20628379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 20628379 is about 4541.8475315669. The cubic root of 20628379 is about 274.2553030958.

The spelling of 20628379 in words is "twenty million, six hundred twenty-eight thousand, three hundred seventy-nine".