20651419 has 2 divisors, whose sum is σ = 20651420. Its totient is φ = 20651418.

The previous prime is 20651381. The next prime is 20651429. The reversal of 20651419 is 91415602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20651419 - 2¹⁵ = 20618651 is a prime.

It is a super-2 number, since 2×20651419² = 852962213427122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20651429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10325709 + 10325710.

It is an arithmetic number, because the mean of its divisors is an integer number (10325710).

Almost surely, 2^20651419 is an apocalyptic number.

20651419 is a deficient number, since it is larger than the sum of its proper divisors (1).

20651419 is an equidigital number, since it uses as much as digits as its factorization.

20651419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 20651419 is about 4544.3832364800. The cubic root of 20651419 is about 274.3573710790.

The spelling of 20651419 in words is "twenty million, six hundred fifty-one thousand, four hundred nineteen".