20898379 has 2 divisors, whose sum is σ = 20898380. Its totient is φ = 20898378.

The previous prime is 20898349. The next prime is 20898401. The reversal of 20898379 is 97389802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20898379 - 2⁹ = 20897867 is a prime.

It is not a weakly prime, because it can be changed into another prime (20898349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10449189 + 10449190.

It is an arithmetic number, because the mean of its divisors is an integer number (10449190).

Almost surely, 2^20898379 is an apocalyptic number.

20898379 is a deficient number, since it is larger than the sum of its proper divisors (1).

20898379 is an equidigital number, since it uses as much as digits as its factorization.

20898379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 20898379 is about 4571.4744886087. The cubic root of 20898379 is about 275.4466746373.

The spelling of 20898379 in words is "twenty million, eight hundred ninety-eight thousand, three hundred seventy-nine".