20914919 has 2 divisors, whose sum is σ = 20914920. Its totient is φ = 20914918.

The previous prime is 20914903. The next prime is 20914931. The reversal of 20914919 is 91941902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20914919 - 2⁴ = 20914903 is a prime.

It is a super-2 number, since 2×20914919² = 874867673553122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20914939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10457459 + 10457460.

It is an arithmetic number, because the mean of its divisors is an integer number (10457460).

Almost surely, 2^20914919 is an apocalyptic number.

20914919 is a deficient number, since it is larger than the sum of its proper divisors (1).

20914919 is an equidigital number, since it uses as much as digits as its factorization.

20914919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 20914919 is about 4573.2831751380. The cubic root of 20914919 is about 275.5193228015.

The spelling of 20914919 in words is "twenty million, nine hundred fourteen thousand, nine hundred nineteen".